@Article{ ComSpeSte21, author = { Comi, Giovanni Eugenio and Spector, Daniel and Stefani, Giorgio }, title = { The fractional variation and the precise representative of $BV^{\alpha,p}$ functions }, journal = { Fract. Calc. Appl. Anal. }, year = { 2022 }, doi = { 10.1007/s13540-022-00036-0 }, volume = { 25 }, pages = { 520-558 }, URL = { http://cvgmt.sns.it/paper/5280/ }, note = { cvgmt preprint} }