@article{MZ_1973__135_172011,
     author = {Norman L. Johnson and Robert E. Seydel},
     title = {A {Class} of {Translation} {Planes} of {Order} 3...},
     journal = {Mathematische Zeitschrift},
     pages = {271--278},
     publisher = {mathdoc},
     volume = {135},
     year = {1973},
     zbl = {0284.50008},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__135_172011/}
}