@article{MS2_1998__81_2_167436,
     author = {G. Shabat and V. Shabat and M. Razin},
     title = {Edge operators.},
     journal = {Mathematica Scandinavica},
     pages = {199--211},
     publisher = {mathdoc},
     volume = {81},
     number = {2},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MS2_1998__81_2_167436/}
}