00537naa#a2200169#i#450# EN\INFRA-M\bibl\114047 20260331113640.2 2308-4898 20250925b2025####ek#y0engy0150####ca RU Cyclic and Ruled Surfaces as ∞ 2 Points Equidistant From Two Given Geometric Shapes. Part 1 Journal article Moscow INFRA-M Academic Publishing LLC. 2025 12 с. Journal article local Геометрия. 514 Sal'kov N. A. zh-szf.ru