@article{RM_1986_41_5_a23,
     author = {S. M. Natanzon},
     title = {Topological classification of pairs of commuting antiholomorphic involutions of {Riemann} surfaces},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {159--160},
     publisher = {mathdoc},
     volume = {41},
     number = {5},
     year = {1986},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1986_41_5_a23/}
}