@article{MZ_1967__99_170773,
     author = {Peter Yff},
     title = {Groups with {Identical} {Subgroups} {Structures.}},
     journal = {Mathematische Zeitschrift},
     pages = {178--181},
     publisher = {mathdoc},
     volume = {99},
     year = {1967},
     zbl = {0166.02101},
     url = {http://geodesic.mathdoc.fr/item/MZ_1967__99_170773/}
}