@article{ZNSL_2016_446_a2,
     author = {M. Deryagina},
     title = {On the enumeration of hypermaps which are self-equivalent with respect to reversing the colors of vertices},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {31--39},
     publisher = {mathdoc},
     volume = {446},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2016_446_a2/}
}