• Článek:
    Periodicita geotektonických etap a vznik uhlí (1998/1–2)
    Květ, R., 1998: The periodicity of geotectonic stages and coal generation. - Acta Mus. Moraviae, Sci. Geol., 83, 1-2, 115-121 (with Czech summary)

    ...make it possible to consider major cycles of coal genesis. The duration of the main coal genesis period might have been some 40 million years, starting with the end of the third quarter of the geotectonic stage and coming to an end at about the middle of the fourth quarter....

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