@article{10_1017_S0008439500031581,
     author = {El{\'\i}asson, Halld\'or I.},
     title = {Perspectives in {Nonlinearity,} by {Melvyn} {S.} {Berger} and {Marion} {S.} {Berger.} 189 pages. {Benjamin,} {New} {York,} 1968. {Cloth} {U.S.} $12.50; Paper U.S. $3.95.},
     journal = {Canadian mathematical bulletin},
     pages = {316--316},
     year = {1972},
     volume = {15},
     number = {2},
     doi = {10.1017/S0008439500031581},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500031581/}
}