KORDZAIA Н., and KOVALIV І. “arketing esearch of consumer’s references in ealth-mproving roducts”. NTERNATIONAL CIENTIFIC-RACTICAL OURNAL OMMODITIES ND ARKETS, vol. 31, no. 3, Sept. 2019, pp. 29-37, doi:10.31617/tr.knute.2019(31)03.