Guiotto, M., P. G. di Summa, G. Argentino, and M. Cherubino. “The Proximal Ulnar Perforator Flap (PUPF) for Hand Digital Reconstruction: An Anatomical Study”. Journal of Plastic Surgery and Hand Surgery, vol. 55, no. 4, Aug. 2021, pp. 255-9, doi:10.1080/2000656X.2021.1873793.