@article{AA_2004_16_2_a1,
     author = {N. D. Lebedeva},
     title = {Spaces without conjugate points and with fundamental group of polynomial growth},
     journal = {Algebra i analiz},
     pages = {69--81},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2004_16_2_a1/}
}