@article{ZNSL_1977_71_a17,
     author = {V. M. Tsvetkov},
     title = {On the {Euler{\textendash}Poincare} characteristic of pro-$p$-groups},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {256--258},
     year = {1977},
     volume = {71},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1977_71_a17/}
}