Oliveira-Filho, J., V. F. Araujo, R. S. Queiroz, L. S. Nunes, and T. S. Masuko. “Brachial Plexus Variants: An Anatomic Study”. Journal of Medical and Biological Sciences, vol. 8, no. 2, June 2009, pp. 142-5, doi:10.9771/cmbio.v8i2.4063.