%0 Book Section
%U https://doi.org/10.1515/9783111185675-009
%B Differential Equations
%B A First Course on ODE and a Brief Introduction to PDE
%T 9 Phase plane analysis
%A Antonio Ambrosetti
%A Shair Ahmad
%D 2024
%I De Gruyter
%C Berlin, Boston
%P 143-166
%R doi:10.1515/9783111185675-009
%@ 9783111185675
%[ 2026-05-03