id	domain	url
stem-1008	scholar.google.com	https://scholar.google.com/citations?user=jv8gqy8aaaaj&hl=ru
stem-1008	www.ncbi.nlm.nih.gov	https://www.ncbi.nlm.nih.gov/pmc/articles/pmc194697/pdf/mlab00247-0013.pdf
stem-1008	stedmansonline.com	http://stedmansonline.com/webfiles/dictstedmans28/app04.pdf
stem-1008	www.upm.ro	http://www.upm.ro/ldmd/ldmd01/lds/lds%2001%2022.pdf
stem-1008	www.ncbi.nlm.nih.gov	https://www.ncbi.nlm.nih.gov/pmc/articles/pmc1079361
stem-1008	stedmansonline.com	http://stedmansonline.com/webfiles/dictstedmans28/app04.pdf
stem-1008	www.upm.ro	http://www.upm.ro/ldmd/ldmd-01/lds/lds%2001%2022.pdf
stem-1008	www.upm.ro	http://www.upm.ro/ldmd/ldmd-01/lds/lds%2001%2022.pdf