Ilyina Natalya V., and Egorov Alexander Y. “The Upper Triassic of Northern Middle Siberia: Stratigraphy and Palynology”. Polar Research 27, no. 3 (December 1, 2008): 372-392. Accessed April 18, 2024. https://polarresearch.net/index.php/polar/article/view/2896.