Nelson CF, Lawrence DJ, Triano JJ, Bronfort G, Perle SM, Metz RD, Hegetschweiler K, LaBrot T (2005). "Chiropractic as spine care: a model for the profession". Chiropractic & Osteopathy. 13 (1). s. 9. doi:10.1186/1746-1340-13-9. PMC1185558. PMID16000175.
Nelson CF, Lawrence DJ, Triano JJ, Bronfort G, Perle SM, Metz RD, Hegetschweiler K, LaBrot T (2005). "Chiropractic as spine care: a model for the profession". Chiropractic & Osteopathy. 13 (1). s. 9. doi:10.1186/1746-1340-13-9. PMC1185558. PMID16000175.