Jean-Michel Autebert Matthieu Latapy Sylviane R. Schwer Le treillis des chemins de Delannoy. 225-234 2002 258 Discret. Math. 1-3 https://doi.org/10.1016/S0012-365X(02)00351-5 db/journals/dm/dm258.html#AutebertLS02