1 Table of Contents: “... The Slow Vector Field -- 4 Slow-Fast Cycles -- 5 The Slow Divergence Integral -- 6 Breaking Mechanisms -- 7...”

2 Table of Contents: “...Retard à la bifurcation : du local au global -- On bifurcation of limit cycles from centers...”

3 “... bifurcations of limit cycles in families of planar vector fields. A systematic introduction is given...”

4 “... bifurcations of limit cycles in families of planar vector fields. A systematic introduction is given...”