@article{AM2_1973__9_136372,
     author = {T.R. BUMBY},
     title = {On a {Problem} of {D'Atri} and {Nickerson} {(Short} {Communication)}},
     journal = {Aequationes mathematicae},
     pages = {308--309},
     year = {1973},
     volume = {9},
     url = {http://geodesic.mathdoc.fr/item/AM2_1973__9_136372/}
}