2 citations to https://www.mathnet.ru/rus/sm1150
  1. Alexandrov V., “Around Efimov'S Differential Test For Homeomorphism”, Beitr. Algebr. Geom., 62:1 (2021), 7–20  crossref  isi
  2. Zorich V., “The Global Homeomorphism Theorem for Space Quasi-Conformal Mappings, its Development and Related Open Problems”, Lect. Notes Math., 1508 (1992), 132–148  crossref  mathscinet  zmath  isi