00627naa#a2200193#i#450# EN\\bibl\10141 /en/manage/index 20250116135144.4 2308-8877 20151203b2015####ek#y0engy0150####ca RUS RU Plane curves which generalize classic quadrics Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2015 4 с. Journal article local Ryzhkova E. Sitnik S. fht.editorum.ru /en/manage/index