@article{TMF_2020_204_3_a5,
     author = {S. M. Natanzon and A. Yu. Orlov},
     title = {Hurwitz numbers from {Feynman} diagrams},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {396--429},
     publisher = {mathdoc},
     volume = {204},
     number = {3},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2020_204_3_a5/}
}