CΓ-PROPERTY AND APPROXIMATELY DIFFERENTIABLE FUNCTIONS ArticleIsakov N.M.Mathematical Notes. Vol. 44. 1988. P.. 833-842
A GLOBAL PROPERTY OF APPROXIMATELY DIFFERENTIABLE FUNCTIONS ArticleIsakov N.M.Mathematical Notes. Vol. 41. 1987. P.. 280-285
THEOREMS ON THE SMOOTHNESS OF THE RIGHT INVERSE ArticleIsakov N.M.Mathematical Notes. Vol. 41. 1987. P.. 124-131
