@article{10_4153_CJM_1996_029_x,
     author = {Goulden, I. P. and Jackson, D. M.},
     title = {Maps in {Locally} {Orientable} {Surfaces,} the {Double} {Coset} {Algebra,} and {Zonal} {Polynomials}},
     journal = {Canadian journal of mathematics},
     pages = {569--584},
     year = {1996},
     volume = {48},
     number = {3},
     doi = {10.4153/CJM-1996-029-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1996-029-x/}
}