Moorrees, Coenraad F. A.; Kean, Martin R. (1 Jun 1958). "Natural head position, a basic consideration in the interpretation of cephalometric radiographs". American Journal of Physical Anthropology (بالإنجليزية). 16 (2): 213–234. DOI:10.1002/ajpa.1330160206. ISSN:1096-8644.
Moorrees, Coenraad F. A.; Kean, Martin R. (1 Jun 1958). "Natural head position, a basic consideration in the interpretation of cephalometric radiographs". American Journal of Physical Anthropology (بالإنجليزية). 16 (2): 213–234. DOI:10.1002/ajpa.1330160206. ISSN:1096-8644.
Oria، A؛ Schellino، E؛ Massaglia، M؛ Fornengo، B (يونيو 1991). "[A comparative evaluation of Steiner's and McNamara's methods for determining the position of the bone bases]". Minerva Stomatol. ج. 40 ع. 6: 381–5. PMID:1944052.