المؤلفون: Rozgonjuk, Dmitri, Täht, Karin, Vassil, Kristjan
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::130bc81ab4f0e78300e93c622771d23eTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db0f27680b8350bcf5694d0d90d7f45bTest