@article{GDZPPN002488930, title = {Generalized Solutions to Nonlinear First-Order Systems.}, journal = {Monatshefte f\"ur Mathematik}, volume = {118}, year = {1994}, pages = {7-20}, zbl = {0807.35020}, url = {http://dml.mathdoc.fr/item/GDZPPN002488930} }
Biagioni, H.A. Generalized Solutions to Nonlinear First-Order Systems.. Monatshefte für Mathematik, Tome 118 (1994) pp. 7-20. http://gdmltest.u-ga.fr/item/GDZPPN002488930/