Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS2_1977__40_166512, author = {C.T. Ng}, title = {Universal parallel composition laws and their representations.}, journal = {Mathematica Scandinavica}, pages = {25--45}, publisher = {mathdoc}, volume = {40}, year = {1977}, zbl = {0366.94058}, url = {http://geodesic.mathdoc.fr/item/MS2_1977__40_166512/} }
C.T. Ng. Universal parallel composition laws and their representations.. Mathematica Scandinavica, Tome 40 (1977), pp. 25-45. http://geodesic.mathdoc.fr/item/MS2_1977__40_166512/