@article{ZNSL_2016_446_a7,
     author = {A. Mednykh and R. Nedela},
     title = {Recent progress in enumeration of hypermaps},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {139--164},
     publisher = {mathdoc},
     volume = {446},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2016_446_a7/}
}