@article{Adamczyk:2020,
author
=
"J.Adamczyk and M.Graczyk",
title
=
"Green certificates as an instrument to support renewable energy in Poland-strengths and weaknesses",
journal
=
"Environmental Science and Pollution Research",
volume
=
"Vol. 27",
pages
=
"6577--6588",
year
=
"2020",
}