@article{10_37236_1950,
     author = {Chunwei Song},
     title = {The generalized {Schr\"oder} theory},
     journal = {The electronic journal of combinatorics},
     year = {2005},
     volume = {12},
     doi = {10.37236/1950},
     zbl = {1077.05010},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1950/}
}