Курбатова І, Коновенко Н. The main theorems of the theory of 2F-planar mappings of pseudo-Riemannian spaces with f-structure. PIGC [Internet]. 6May2020 [cited 28Jun.2026];13(1):9-2. Available from: https://journals.ontu.edu.ua/index.php/geometry/article/view/1707