@online{ timsrc, author = "Weissman, Irving", title = "Biology and transplantation of stem and progenitor cells", publisher = "Universität Tübingen", year = "2001", month = "Jul", day = "20", url = "https://timms.uni-tuebingen.de:443/tp/UT_20010720_001_antigen_0008", urldate = "2024-03-28" }