@article{GDZPPN002354233,
title = {Universal parallel composition laws and their representations.},
journal = {Mathematica Scandinavica},
volume = {40},
year = {1977},
pages = {25-45},
zbl = {0366.94058},
url = {http://dml.mathdoc.fr/item/GDZPPN002354233}
}
Ng, C.T. Universal parallel composition laws and their representations.. Mathematica Scandinavica, Tome 40 (1977) pp. 25-45. http://gdmltest.u-ga.fr/item/GDZPPN002354233/