id	domain	url
efajoead-4271	doi.org	https://doi.org/10.37147/eltr.2020.04020
efajoead-4271	doi.org	https://doi.org/10.13189/ujer.2016.040701
efajoead-4271	pareonline.net	http://pareonline.net/pdf/v15n1.pdf
efajoead-4271	www.ijicc.net	www.ijicc.net
efajoead-4271	doi.org	https://doi.org/10.24093/awej/vol9no1.28
efajoead-4271	doi.org	https://doi.org/10.18869/acadpub.ijree.2.1.34
efajoead-4271	doi.org	https://doi.org/10.1016/j.sbspro.2013.10.131
efajoead-4271	doi.org	https://doi.org/10.12973/eu-jer.9.3.967
efajoead-4271	doi.org	https://doi.org/10.5539/elt.v7n2p110