@article{10_1017_S0008439500028605,
     author = {Ponzo, P. J.},
     title = {Introduction to {Ordinary} {Differential} {Equations,} by {Shepley} {L.} {Ross.} {Blaisdell} {Publishing} {Co.,1966.} viii + 337 pages. $7.50.},
     journal = {Canadian mathematical bulletin},
     pages = {619--620},
     year = {1967},
     volume = {10},
     number = {4},
     doi = {10.1017/S0008439500028605},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500028605/}
}