id	domain	url
issue-502	doi.org	https://doi.org/10.30525/2256-0742/2018-4-4-217-222
issue-502	www.imf.org	http://www.imf.org/external/index.htm
issue-502	www.indexmundi.com	http://www.indexmundi.com/commodities/?commodity
issue-502	ukrstat.org	https://ukrstat.org/operativ/operativ2005/zd/zd_rik/zd_r/gs_r.html
issue-502	www.jstor.org	http://www.jstor.org/stable/2229041