00527naa#a2200181#i#450# EN\INFRA-M\bibl\19050 20240427072812.6 2308-4898 20171213b2017####ek#y0engy0150####ca RUS RU Application of Dupin Cyclide’s Properties to Inventions Journal article Moscow INFRA-M Academic Publishing LLC. 2017 6 с. Journal article local Математика. 51 RUS Sal'kov N. A. riorpub.com