Giovanni Alberti and Carlo Mantegazza
A note on the theory of SBV functions
Boll. Un. Mat. Ital. B (7) 11 (1997), no. 2, 375-382

Giovanni Alberti, Marianna Csörnyei, Miklós Laczkovich and David Preiss
Denjoy-Young-Saks theorem for approximate derivatives revisited
Real Anal. Exchange 26 (2000/01), no. 1, 485-488

Paul Erdös and David Preiss
Decomposition of spheres in Hilbert spaces
Comment. Math. Univ. Carolinae 17 (1976), no. 4, 791-795