For citations:
Yuexiang H., Shardanova T.A., Chongxing H. Lithological and geochemical characteristics of graptolite schists Lower Silurian (Yangtze platform, China). Moscow University Bulletin. Series 4. Geology. 2020;(4):81-86. (In Russ.) https://doi.org/10.33623/0579-9406-2020-4-81-86