@article{AM2_1981__23_136913,
     author = {S.S. Sane},
     title = {On the theorems of {Drake} and {Lenz.}},
     journal = {Aequationes mathematicae},
     pages = {223--232},
     publisher = {mathdoc},
     volume = {23},
     year = {1981},
     zbl = {0512.51012},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__23_136913/}
}