TY  - RPRT
TI  - A generalized Zubov formulation for limit cycles in third order nonlinear systems.
AU  - Schultz, D. G.
AU  - Wozny, M. J.
PY  - 1966
UR  - https://ntrs.nasa.gov/citations/19670041616
ID  - 19670041616
ER  -