@Article{ PraRad17, author = { Pratelli, Aldo and Radici, Emanuela }, title = { On the planar minimal BV extension problem }, journal = { Rend. Lincei Mat. Appl. }, year = { 2018 }, pages = { }, URL = { http://cvgmt.sns.it/paper/3520/ }, note = { cvgmt preprint} }