@article{RM_1997_52_6_a21,
     author = {S. P. Novikov},
     title = {The {Schr\"odinger} operator on graphs and topology},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1320--1321},
     publisher = {mathdoc},
     volume = {52},
     number = {6},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1997_52_6_a21/}
}