1. Generalized permutation patterns and a classification of the Mahonian statistics;Babson;Seminaire Lotharingien de Combinatoire,2000
2. Generalized Hypergeometric Series;Bailey,1964
3. Enumeration of up-down sequences;Carlitz;Discrete Math.,1973
4. Up-down and down-up partitions;Carlitz,1978
5. Up-down sequences;Carlitz;Duke Math. J.,1972