ORIGIN OF PLANETARY-NEBULAE - MORPHOLOGY, CARBON-TO-OXYGEN ABUNDANCE RATIOS, AND CENTRAL STAR MULTIPLICITY

[91] SEATON MJ, 1983, IAU S, V103, P129

[92] THE GALACTIC ABUNDANCE GRADIENT [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1983, 204 (01) : 53 - &

[93] IONIZATION STRUCTURE AND COMPOSITION OF PLANETARY NEBULA NGC-7027 [J]. ASTROPHYSICAL JOURNAL, 1978, 219 (02) : 565 - 574

[94] THE OPTICAL AND ULTRAVIOLET-SPECTRUM OF THE PLANETARY-NEBULA NGC 2440 [J]. ASTROPHYSICAL JOURNAL, 1981, 248 (02) : 569 - 583

[95] SOLF J, 1984, ASTRON ASTROPHYS, V139, P296

[96] OPTICAL CONFIRMATION OF A VERY COMPACT BIPOLAR NEBULA ASSOCIATED WITH THE SYMBIOTIC STAR V1016 CYGNI [J]. ASTROPHYSICAL JOURNAL, 1983, 266 (02) : L113 - &

[97] Torres-Peimbert S., 1977, Revista Mexicana de Astronomia y Astrofisica, V2, P181

[98] SPECIAL ISSUE - THE 6TH CATALOG OF GALACTIC WOLF-RAYET STARS, THEIR PAST AND PRESENT [J]. SPACE SCIENCE REVIEWS, 1981, 28 (03) : 227 - 306

[99] INTERNAL KINEMATICS OF THE PLANETARY NEBULAE [J]. REVIEWS OF MODERN PHYSICS, 1958, 30 (03) : 1025 - 1029

[100] THE NUCLEAR AND NEBULAR SPECTRA OF THE PLANETARY NEBULA NGC-2392 [J]. ASTROPHYSICAL JOURNAL, 1948, 108 (02) : 201 - &

[91] SEATON MJ, 1983, IAU S, V103, P129

[92] THE GALACTIC ABUNDANCE GRADIENT [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1983, 204 (01) : 53 - &

[93] IONIZATION STRUCTURE AND COMPOSITION OF PLANETARY NEBULA NGC-7027 [J]. ASTROPHYSICAL JOURNAL, 1978, 219 (02) : 565 - 574

[94] THE OPTICAL AND ULTRAVIOLET-SPECTRUM OF THE PLANETARY-NEBULA NGC 2440 [J]. ASTROPHYSICAL JOURNAL, 1981, 248 (02) : 569 - 583

[95] SOLF J, 1984, ASTRON ASTROPHYS, V139, P296

[96] OPTICAL CONFIRMATION OF A VERY COMPACT BIPOLAR NEBULA ASSOCIATED WITH THE SYMBIOTIC STAR V1016 CYGNI [J]. ASTROPHYSICAL JOURNAL, 1983, 266 (02) : L113 - &

[97] Torres-Peimbert S., 1977, Revista Mexicana de Astronomia y Astrofisica, V2, P181

[98] SPECIAL ISSUE - THE 6TH CATALOG OF GALACTIC WOLF-RAYET STARS, THEIR PAST AND PRESENT [J]. SPACE SCIENCE REVIEWS, 1981, 28 (03) : 227 - 306

[99] INTERNAL KINEMATICS OF THE PLANETARY NEBULAE [J]. REVIEWS OF MODERN PHYSICS, 1958, 30 (03) : 1025 - 1029

[100] THE NUCLEAR AND NEBULAR SPECTRA OF THE PLANETARY NEBULA NGC-2392 [J]. ASTROPHYSICAL JOURNAL, 1948, 108 (02) : 201 - &