id	domain	url
cet-14394	www.cetjournal.it	www.cetjournal.it
cet-14394	www.ictct.net	https://www.ictct.net/wp-content/uploads/smos_library/lib_perkins_harris_1967.pdf>
cet-14394	doi.org	https://doi.org/10.3303/cet2189040
cet-14394	doi.org	https://doi.org/10.1016/j.aap.2019.03.005
cet-14394	doi.org	https://doi.org/10.1016/j.aap.2017.08.018