Duque, M., J. Lopes, S. Ribeiro, and I. Araújo. “Lumbar Tattoo and Labour Analgesia: A Case of Surgical Approach”. NASCER E CRESCER - BIRTH AND GROWTH MEDICAL JOURNAL, vol. 26, no. 4, Dec. 2017, pp. 255-7, doi:10.25753/BirthGrowthMJ.v26.i4.9826.