@article{1077466956,
author = {Carlitz, L. and Riordan, J.},
title = {The number of labeled two-terminal series-parallel networks},
journal = {Duke Math. J.},
volume = {23},
number = {1},
year = {1956},
pages = { 435-445},
language = {en},
url = {http://dml.mathdoc.fr/item/1077466956}
}
Carlitz, L.; Riordan, J. The number of labeled two-terminal series-parallel networks. Duke Math. J., Tome 23 (1956) no. 1, pp. 435-445. http://gdmltest.u-ga.fr/item/1077466956/