Correction to: Separatrices and singular points; Volume 20 (1980), 59-72. C.S. Hartzman — 1982 Aequationes mathematicae
Separatrices and singular points. (Short Communication). C.S. Hartzman — 1978 Aequationes mathematicae
Separatrix conditions yielding either periodic orbits or unusual behavior for flows on M3. C.S. Hartzman; D.R. Naugler — 1981 Aequationes mathematicae
Separatrix conditions yielding either periodic orbits or unusual behavior for flows on M3. (Short Communication). C.S. Hartzman; D.R. Naugler — 1981 Aequationes mathematicae