100 citations. 100 recent examples of citation (favorable) of these works (environmental science) which were authored, co-authored by S.A.Ostroumov, MSU: Cited in Russia, China, U.S., Tajikistan, Canada, India, Hungary, Australia, et al., https://5bio5.blogspot.com/2026/04/100.html ; https://www.researchgate.net/publication/403873820 ;