@article{articleed3f2c30,
title   = {Free and properly discontinuous actions of discrete groups on homotopy circles},
author = {Golasinski, Marek and Gonçalves, Daciberg Lima and Jimenez, Rolando},
year = {2015},
doi = {10.1134/S1061920815030036},
journal   = {Russian Journal of Mathematical Physics}
}