@article{GDZPPN002037807, title = {A generalization of parallel addition.}, journal = {Aequationes mathematicae}, volume = {38}, year = {1989}, pages = {99-110}, zbl = {0682.47024}, url = {http://dml.mathdoc.fr/item/GDZPPN002037807} }
Eriksson-Bique, S.-L.; Leutwiler, H. A generalization of parallel addition.. Aequationes mathematicae, Tome 38 (1989) pp. 99-110. http://gdmltest.u-ga.fr/item/GDZPPN002037807/