@article{MZ_1962__79_170061,
     author = {W.J. Coles and D.H. Tucker},
     title = {Equivalence of {Certain} {Differential} {Equations.}},
     journal = {Mathematische Zeitschrift},
     pages = {224--226},
     publisher = {mathdoc},
     volume = {79},
     year = {1962},
     zbl = {0105.28703},
     url = {http://geodesic.mathdoc.fr/item/MZ_1962__79_170061/}
}