Learman, Yaffa; Katznelson, Mariassa Bat-Miriam; Bonné-Tamir, BatSheva; Engel, Joel; Hertz, Marjorie; Goodman, Richard M.; Opitz, John M. (1981). "Symphalangism with multiple anomalies of the hands and feet: A new genetic trait". American Journal of Medical Genetics. 10 (3): 245–55. doi:10.1002/ajmg.1320100308. ISSN1096-8628. PMID6272576.
Learman, Yaffa; Katznelson, Mariassa Bat-Miriam; Bonné-Tamir, BatSheva; Engel, Joel; Hertz, Marjorie; Goodman, Richard M.; Opitz, John M. (1981). "Symphalangism with multiple anomalies of the hands and feet: A new genetic trait". American Journal of Medical Genetics. 10 (3): 245–55. doi:10.1002/ajmg.1320100308. ISSN1096-8628. PMID6272576.
Learman, Yaffa; Katznelson, Mariassa Bat-Miriam; Bonné-Tamir, BatSheva; Engel, Joel; Hertz, Marjorie; Goodman, Richard M.; Opitz, John M. (1981). "Symphalangism with multiple anomalies of the hands and feet: A new genetic trait". American Journal of Medical Genetics. 10 (3): 245–55. doi:10.1002/ajmg.1320100308. ISSN1096-8628. PMID6272576.