id	domain	url
hassl-818	www.doi.org	https://www.doi.org/10.18488/journal.73.2019.71.46.55
hassl-818	doi.org	https://doi.org/10.4314/gjedr.v16i2.4
hassl-818	doi.org	https://doi.org/10.11114/jets.v4i5.1509
hassl-818	doi.org	https://doi.org/10.1016/j.sbspro.2015.01.590
hassl-818	doi.org	https://doi.org/10.14221/ajte.2014v39n11.9
hassl-818	doi.org	https://doi.org/10.1016/j.tate.2006.04.022
hassl-818	doi.org	https://doi.org/10.1016/j.tate.2003.09.007
hassl-818	www.eera-ecer.de	http://www.eera-ecer.de/ecerprogrammes/conference/6/contribution/17309/
hassl-818	doi.org	https://doi.org/10.1016/s0742-051x(03)00047-7
hassl-818	doi.org	https://doi.org/10.13189/ujer.2018.060106
hassl-818	www.eera-ecer.de	http://www.eera-ecer.de/ecer-programmes/conference/6/contribution/17309
hassl-818	www.eera-ecer.de	http://www.eera-ecer.de/ecer-programmes/conference/6/contribution/17309