Esteban-Garrido, E., A. Hernández-Núñez, B. Echeverría-García, F.E. Rojas-Farías, and J. Borbujo. “Ultrasound Appearance of a Sucking Knuckle Pad. An Update”. European Journal of Pediatric Dermatology 29, no. 1 (March 11, 2019): 20–22. Accessed September 9, 2026. https://ejpd.migration.pkpps03.publicknowledgeproject.org/index.php/journal/article/view/1943.