@article{ZNSL_1976_66_a5,
     author = {O. A. Ivanov},
     title = {Homotopy classification of some four-dimensional manifolds},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {164--171},
     publisher = {mathdoc},
     volume = {66},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1976_66_a5/}
}