id	domain	url
stem-6859	zienjournals.com	https://zienjournals.com/index.php/jpip/article/view/3364
stem-6859	ijsshr.in	https://ijsshr.in/v4i12/doc/60.pdf
stem-6859	europeanscience.org	https://europeanscience.org/index.php/4/article/download/102/99
stem-6859	www.researchgate.net	https://www.researchgate.net/publication/338678889