@article{05903054,
title = {Concave compositions.},
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {18},
year = {2011},
zbl = {1229.05029},
language = {en},
url = {http://dml.mathdoc.fr/item/05903054}
}
Andrews, George E. Concave compositions.. The Electronic Journal of Combinatorics [electronic only], Tome 18 (2011) . http://gdmltest.u-ga.fr/item/05903054/