1-4 of 4 Books

Qualitative Theory of Dynamical Systems, Tools and Applications for Economic Modelling
By Gian Italo Bischi,Anastasiia Panchuk,Davide Radi

Nonlinear Fokker-Planck Equations: Fundamentals and Applications (Springer Series in Synergetics)
By T.D. Frank

Introduction to Partial Differential Equations (Undergraduate Texts in Mathematics)
By Peter Olver