@article{EUG_1990__26_a9,
     author = {Panagiotis Soules},
     title = {On {Certain} {Classes} of rigid groups},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}
},
     pages = {103-113},
     publisher = {mathdoc},
     volume = {26},
     year = {1990},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1990__26_a9/}
}