1984 Physics of Thermal Gaseous Nebulae. Dordrecht, The Netherlands: Reidel.
1986 With B. Zuckerman. Origin of planetary nebulae: Morphology, carbon-to-oxygen abundance ratios, and central star multiplicity. Astrophys. J. 301:772-789.
1987 With C. D. Keyes. A spectroscopic survey of 51 planetary nebulae. Astrophys. J. 65(suppl.):405-428.
1994 With S. Hyung and W. A. Feibelman. The spectrum of the variable planetary nebula IC 4997. Astrophys. J. 93(suppl.):465-483.
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