@article{10_37236_2344,
     author = {Shi-Mei Ma},
     title = {A family of two-variable derivative polynomials for tangent and secant},
     journal = {The electronic journal of combinatorics},
     year = {2013},
     volume = {20},
     number = {1},
     doi = {10.37236/2344},
     zbl = {1267.05025},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/2344/}
}