@article{ADM_2013_15_2_a9,
     author = {N. N. Semko (Jr.)},
     title = {Groups with many pronormal and transitively normal subgroups},
     journal = {Algebra and discrete mathematics},
     pages = {269--286},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2013_15_2_a9/}
}