00451naa#a2200169#i#450# EN\INFRA-M\bibl\266 20241221102805.6 2308-4898 20130603b2013####ek#y0engy0150####ca RUS RU Graphics of imaginary numbers Journal article Moscow INFRA-M Academic Publishing LLC. 2013 1 с. Journal article local Savelev Yuriy naukaru.ru