G. Alberti, M. Csörnyei, M. Laczkovich, D. Preiss:
Denjoy-Young-Saks theorem for approximate derivatives revisited
Real Anal. Exchange Vol. 26 (2000/01), N. 1, p. 485-488, 2000

G. Alberti, M. Csörnyei, A. Pelczynski, D. Preiss:
BV has the bounded approximation property
J. Geom. Anal. Vol. 15, N. 1, p. 1-7, 2005

G. Alberti, M. Csörnyei, D. Preiss:
Structure of null sets in the plane and applications
2005

D. Preiss, G. Speight:
Differentiability of Lipschitz Functions in Lebesgue Null Sets
Inventiones Mathematicae Vol. 199, N. 2, p. 517-559, 2013