id	domain	url
gssr-518	doi.org	https://doi.org/10.56556/gssr.v2i2.518
gssr-518	www.energypedia.info	www.energypedia.info/wiki/biogas_biogas
gssr-518	www.energypedia.info	http://www.energypedia.info/wiki/biogas_biogas
gssr-518	www.irena.org	www.irena.org/remap