الإتاحة: https://doi.org/10.1046/j.1365-2249.2002.01823.xTesthttps://academic.oup.com/cei/article-pdf/129/3/502/42139976/j.1365-2249.2002.01823.x.pdfTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d6d9e0a49200da65d869591a4ac6e04Testhttps://doi.org/10.1046/j.1365-2249.2002.01823.xTest