found: Makarkin, N. P. Geoėkologicheskiĭ analiz territorii ėtnogeneza mordovskogo naroda, 2003:t.p. (Kovylkino)
found: GEOnet, 02-14-05(Kovylkino, ppl.; 54°02ʹ25ʺN, 43°55ʹ17ʺE; variant: Kovykino)
found: encycl.yandex.ru/cgi-bin/art(Kovylkino; a city in the southern Mordovskai︠a︡ ASSR on the left bank of the river Moksha)
found: pfo.metod.ru/data/territories/mordovia/towns/kovylkino/texts/info/viewtown(Kovylkino; a town in Mordovii︠a︡ and center of Kovylkinskiĭ raĭon. The town grew out of the village of Voskresenskai︠a︡ Lashma [no publs. in LC data base] and the Arapovo railroad station. It was renamed in 1919 in honor of the revolutionary S.T. Kovylkin. It did not become a town until 1960)