The Concept of Social Marketing while Supplying the Population with Liquefied Gas L.K. Kirillova, G.A. Korzhova, L.H. Mukhametzyanova and A.V. Banartseva SHS Web Conf., 62 (2019) 07002 Published online: 15 March 2019 DOI: 10.1051/shsconf/20196207002