00590naa#a2200193#i#450# EN\\bibl\1997 /en/manage/index 20250206181527.4 1992-5980 20140331b2014####ek#y0engy0150####ca ENG RU Three-dimensional contact problem for a two-layered extra loaded elastic base Journal article rostov on don Don state technical University 2014 2 с. Journal article local Pozharskiy Dmitriy Bedoidze Mariya fht.editorum.ru /en/manage/index