@article{10_37236_3226,
     author = {Alejandro H. Morales and Ekaterina A. Vassilieva},
     title = {Direct bijective computation of the generating series for 2 and 3-connection coefficients of the symmetric group},
     journal = {The electronic journal of combinatorics},
     year = {2013},
     volume = {20},
     number = {2},
     doi = {10.37236/3226},
     zbl = {1267.05042},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/3226/}
}