@book{MSM_1967__163__1_0, author = {Minorsky, N.}, title = {Th\'eorie des oscillations}, series = {M\'emorial des sciences math\'ematiques}, publisher = {Gauthier-Villars}, number = {163}, year = {1967}, zbl = {0146.20503}, mrnumber = {221013}, language = {fr}, url = {http://archive.numdam.org/item/MSM_1967__163__1_0/} }