title: [Freedom of thought and optimism. On the 80th anniversary of the death of I. I. Mechnikov].
authors.forename: S M
authors.initials: SM
authors.lastname: Navashin
authors.forename: Iu O
authors.initials: IuO
authors.lastname: Sazykin
mesh_terms: D001695:Biology / Q000266:history; D049673:History, 20th Century; D012426:Russia; D013850:Thinking