id	domain	url
easat-3238	creativecommons.org	https://creativecommons.org/licenses/by/4.0/)
easat-3238	doi.org	https://doi.org/10.1007/bf02887451
easat-3238	creativecommons.org	https://creativecommons.org/licenses/by/4.0
easat-3238	doi.org	https://doi.org/10.1007/bf02887451