by Nanny Fröman, Nanny Fröman, Per O. Fröman, A. Dzieciol, N. Fröman, P.O. Fröman, A. Hökback, S. Linnaeus, B. Lundborg, E. Walles
This book is the result of two decades spent by the authors developing and refining the phase-integral method to a high level of precision. The efficiency of the phase-integral method has been show…