@article{SM_1990_67_1_a13,
     author = {A. S. Kondrat'ev},
     title = {Prime graph components of finite simple groups},
     journal = {Sbornik. Mathematics},
     pages = {235--247},
     year = {1990},
     volume = {67},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1990_67_1_a13/}
}