@article{MZ_1963__82_170188,
     author = {F.C. Piper},
     title = {Elations of finite projective planes.},
     journal = {Mathematische Zeitschrift},
     pages = {247--258},
     publisher = {mathdoc},
     volume = {82},
     year = {1963},
     zbl = {0114.12603},
     url = {http://geodesic.mathdoc.fr/item/MZ_1963__82_170188/}
}