found: Kulinski, A. Kostenet︠s︡, ot drevnostta do dnes, 1982 (subj.)t.p. (Kostenet︠s︡) p. 5 (located 70 klm from Sofia, became a city in 1964 from merger of Gara Kostenet︠s︡ and Momin Prokhod) [no publs. in LC data base]
found: BGN 6/30/83(Kostenet︠s︡; 42°18ʹN, 23°52ʹE; not to be confused with Kostenet︠s︡, village, 42°16ʹN, 23°49ʹE)
found: Ent︠s︡. bŭlg., 1982:v. 3, p. 750 (city Kostenet︠s︡ and village Kostenet︠s︡ are 7 klm apart, both belong to Kostenet︠s︡ka obshtina)
found: GeoNames, algorithmically matched, 2009(ppl; 42°18ʹ00ʺN 023°52ʹ00ʺE)