Wang YK, Samos CH, Peoples R, Pérez-Jurado LA, Nusse R, Francke U (Mar 1997). "A novel human homologue of the Drosophila frizzled wnt receptor gene binds wingless protein and is in the Williams syndrome deletion at 7q11.23". Human Molecular Genetics. 6 (3): 465–72. doi:10.1093/hmg/6.3.465. PMID9147651.
Wang YK, Spörle R, Paperna T, Schughart K, Francke U (Apr 1999). "Characterization and expression pattern of the frizzled gene Fzd9, the mouse homolog of FZD9 which is deleted in Williams-Beuren syndrome". Genomics. 57 (2): 235–48. doi:10.1006/geno.1999.5773. PMID10198163.
Wang YK, Samos CH, Peoples R, Pérez-Jurado LA, Nusse R, Francke U (Mar 1997). "A novel human homologue of the Drosophila frizzled wnt receptor gene binds wingless protein and is in the Williams syndrome deletion at 7q11.23". Human Molecular Genetics. 6 (3): 465–72. doi:10.1093/hmg/6.3.465. PMID9147651.
Wang YK, Spörle R, Paperna T, Schughart K, Francke U (Apr 1999). "Characterization and expression pattern of the frizzled gene Fzd9, the mouse homolog of FZD9 which is deleted in Williams-Beuren syndrome". Genomics. 57 (2): 235–48. doi:10.1006/geno.1999.5773. PMID10198163.