LYAPUNOV VECTORS TREATMENT FOR BIFURCATIONS IN RETARDED DIFFERENTIAL SYSTEMS M. LE BERRE, E. RESSAYRE, A. TALLET et J. J. ZONDYJ. Phys. Colloques, 49 C2 (1988) C2-389-C2-392DOI: https://doi.org/10.1051/jphyscol:1988292
