@article{10_1017_S0008439500025868,
     author = {Duff, G. F. D.},
     title = {The {Extension} of {Darboux's} {Method,} by {D.} {H.} {Parsons.} {M\'emorial} des {Sciences} math\'ematiques {14Z,} {Gauthier} {Villars,} {Paris,} 1960. 75 pages. $4. 25 or 20 NF.},
     journal = {Canadian mathematical bulletin},
     pages = {207--207},
     year = {1961},
     volume = {4},
     number = {2},
     doi = {10.1017/S0008439500025868},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500025868/}
}