@article{GDZPPN002538199,
title = {On nonlinear superposition, III.},
journal = {Publications de l'Institut Math\'ematique [Elektronische Ressource]},
volume = {40},
year = {1979},
pages = {131-134},
zbl = {0426.35021},
language = {en},
url = {http://dml.mathdoc.fr/item/GDZPPN002538199}
}
Keckic, J.D. On nonlinear superposition, III.. Publications de l'Institut Mathématique [Elektronische Ressource], Tome 40 (1979) pp. 131-134. http://gdmltest.u-ga.fr/item/GDZPPN002538199/