Herrera, Ana Eugenia, Viviana Mojica, Daniela Nieuwveld, Alberto Prats-Galino, Ana María López, and Xavier Sala-Blanch. 2017. “Ultrasound Guided Supraclavicular Perivascular Block. Anatomical, Technical Medial Approach Description and Changes in Regional Perfusion”. Colombian Journal of Anesthesiology 45 (4):272–279. https://www.revcolanest.com.co/index.php/rca/article/view/552.