@article{MR_1984__26_a9,
     author = {Panagiotis Soules},
     title = {On {Certain} {Classes} of rigid groups},
     journal = {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta} E\ensuremath{\pi}\ensuremath{\iota}\ensuremath{\theta}\ensuremath{\varepsilon}\ensuremath{\acute\omega}\ensuremath{\rho}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta}
},
     pages = {103-113},
     publisher = {mathdoc},
     volume = {26},
     year = {1984},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1984__26_a9/}
}