00499naa#a2200169#i#450# EN\\bibl\8099 20210226005535.5 1993-7768 20151201b2015####ek#y0engy0150####ca RUS RU Practice of using household service: foreign and domestic experience Article CHERKIZOVO Russian State University of Tourism and Service 2015 6 с. Article local Ermakova Elena philosoph.editorum.ru