@article{GDZPPN002108410, title = {On the regularity of solutions in Convex Integration theory.}, journal = {Inventiones mathematicae}, volume = {104}, year = {1991}, pages = {165-178}, zbl = {0782.35014}, url = {http://dml.mathdoc.fr/item/GDZPPN002108410} }
Spring, David. On the regularity of solutions in Convex Integration theory.. Inventiones mathematicae, Tome 104 (1991) pp. 165-178. http://gdmltest.u-ga.fr/item/GDZPPN002108410/