URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0bc311b3dc58714aecfc974744b2c6chttps://pubmed.ncbi.nlm.nih.gov/2314121
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ebfe0514b24687cda93ffd9707e998ddhttps://doi.org/10.1038/scientificamerican0885-40
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::458340e4f9825587d19f644bd9c82a80https://pubmed.ncbi.nlm.nih.gov/2924866