@article{SM_2000_191_10_a3,
     author = {V. A. Kolmykov},
     title = {Coxeter transformations and the number~``$-1$''},
     journal = {Sbornik. Mathematics},
     pages = {1471--1476},
     publisher = {mathdoc},
     volume = {191},
     number = {10},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2000_191_10_a3/}
}