@article{IM2_1970_4_3_a1,
     author = {A. S. Mishchenko},
     title = {Homotopy invariants of nonsimply connected manifolds. {I.~Rational} invariants},
     journal = {Izvestiya. Mathematics },
     pages = {506--519},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {1970},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1970_4_3_a1/}
}