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Kovaleva, T. A.; Markevich, V. S.; Bugdaeva, E. V.; Volynets, E. B.; Afonin, M. A. . (2016). New data on palynostratigraphy of the Lipovtsy formation in the Razdol’naya coal Basin (Southern Primorye). Russian Journal of Pacific Geology, 10(1), 50–62. doi:10.1134/S1819714016010061 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research