Polar

@article{berry1916upper,
    author = "Berry, Edward W.",
    title = "Upper Cretaceous Floras of the World",
    year = "1916",
    journal = "Proceedings of the National Academy of Sciences",
    url = "https://doi.org/10.1073/pnas.2.3.186",
    doi = "10.1073/pnas.2.3.186",
    number = "3",
    pages = "186-187",
    volume = "2"
}

@article{harshberger1919upper,
    author = "Harshberger, J. W.",
    title = "Upper Cretaceous Floras",
    year = "1919",
    journal = "Botanical Gazette",
    url = "https://doi.org/10.1086/332592",
    doi = "10.1086/332592",
    number = "6",
    pages = "482-483",
    volume = "68"
}

@misc{bell1956lower,
    author = "Bell, W A",
    title = "Lower Cretaceous floras of western Canada",
    year = "1956",
    url = "https://doi.org/10.4095/101511",
    doi = "10.4095/101511"
}

@misc{dunbar1968ecological2,
    author = "Dunbar, M. J",
    title = "Ecological development in polar regions",
    year = "1968",
    howpublished = "Englewood Cliffs, New Jersey, Prentice-Hall, 119 p",
    note = "talkorigins\_source = {true}; raw\_reference = {Dunbar, M. J., 1968, Ecological development in polar regions: Englewood Cliffs, New Jersey, Prentice-Hall, 119 p.}"
}

The motions of the lithospheric plates have been reconstructed for three time intervals back to the Early Cretaceous. These displacements were analyzed to determine the best-fitting rigid rotation, which could then be ascribed to true polar wander. The true polar wander so obtained is no larger than a few degrees and is within the magnitude of the uncertainties involved.

@article{jurdy1975true,
    author = "Jurdy, D. M. and Van der Voo, R.",
    title = "True Polar Wander since the Early Cretaceous",
    year = "1975",
    journal = "Science",
    abstract = "The motions of the lithospheric plates have been reconstructed for three time intervals back to the Early Cretaceous. These displacements were analyzed to determine the best-fitting rigid rotation, which could then be ascribed to true polar wander. The true polar wander so obtained is no larger than a few degrees and is within the magnitude of the uncertainties involved.",
    url = "https://doi.org/10.1126/science.187.4182.1193",
    doi = "10.1126/science.187.4182.1193",
    number = "4182",
    pages = "1193-1196",
    volume = "187"
}

@article{douglas1982southern,
    author = "Douglas, J.G. and Williams, G.E.",
    title = "Southern polar forests: The Early Cretaceous floras of Victoria and their palaeoclimatic significance",
    year = "1982",
    journal = "Palaeogeography, Palaeoclimatology, Palaeoecology",
    url = "https://doi.org/10.1016/0031-0182(82)90021-9",
    doi = "10.1016/0031-0182(82)90021-9",
    number = "3-4",
    pages = "171-185",
    volume = "39"
}

@misc{douglas1982southern1,
    author = "Douglas, J. G. and Williams, G. W",
    title = "Southern polar forests, the early Cretaceous floras of Victoria and their paleoclimatic significance",
    year = "1982",
    howpublished = "Palaeogeography, Palaeoclimatology, Palaeoecology, v. 39, p. 171-185",
    note = "talkorigins\_source = {true}; raw\_reference = {Douglas, J. G., and Williams, G. W., 1982, Southern polar forests, the early Cretaceous floras of Victoria and their paleoclimatic significance: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 39, p. 171-185.}"
}

@article{lebedev1992the,
    author = "Lebedev, Ye. L.",
    title = "THE CRETACEOUS FLORAS OF NORTHEASTERN ASIA",
    year = "1992",
    journal = "International Geology Review",
    url = "https://doi.org/10.1080/00206819209465637",
    doi = "10.1080/00206819209465637",
    number = "8",
    pages = "794-805",
    volume = "34"
}

@article{cao1994early,
    author = "Cao, Zhengyao",
    title = "Early Cretaceous floras in Circum-Pacific Region of China",
    year = "1994",
    journal = "Cretaceous Research",
    url = "https://doi.org/10.1006/cres.1994.1020",
    doi = "10.1006/cres.1994.1020",
    number = "3",
    pages = "317-332",
    volume = "15"
}

@article{kimura2000notes,
    author = "Kimura, Tatsuaki",
    title = "Notes on the two Early Cretaceous floras in South Korea",
    year = "2000",
    journal = "Geosciences Journal",
    url = "https://doi.org/10.1007/bf02910209",
    doi = "10.1007/bf02910209",
    number = "1",
    pages = "11-14",
    volume = "4"
}

@article{poole2000illicioxylon,
    author = "Poole, I",
    title = "Illicioxylon, an Element of Gondwanan Polar Forests? Late Cretaceous and Early Tertiary Woods of Antarctica",
    year = "2000",
    journal = "Annals of Botany",
    url = "https://doi.org/10.1006/anbo.2000.1208",
    doi = "10.1006/anbo.2000.1208",
    number = "2",
    pages = "421-432",
    volume = "86"
}

@article{alekseev2009genus,
    author = "Alekseev, P. I.",
    title = "Genus Liriodendrites in Cretaceous and early Paleogene floras of Northern Asia",
    year = "2009",
    journal = "Paleontological Journal",
    url = "https://doi.org/10.1134/s0031030109100013",
    doi = "10.1134/s0031030109100013",
    number = "10",
    pages = "1181-1189",
    volume = "43"
}