https://ru.wikipedia.org/wiki/%D0%92%D0%B0%D1%80%D1%84%D0%BE%D0%BB%D0%BE%D0%BC%D0%B5%D0%B5%D0%B2,_%D0%92%D0%B0%D0%BB%D0%B5%D1%80%D0%B8%D0%B9_%D0%92%D0%BB%D0%B0%D0%B4%D0%B8%D0%BC%D0%B8%D1%80%D0%BE%D0%B2%D0%B8%D1%87
The two were Filin and Dolonsky, Denis Vladimirovich not Varfolomeev 50 % correct. Info about Dolonsky below.