Zhang, C. Y., & Kwok, S. (1993). Trace of planetary nebula evolution by distance-independent parameters. The Astrophysical journal. Supplement series, 88(1), 137-167. https://doi.org/10.1086/191818
Chicago Style (17th ed.) CitationZhang, C. Y., and S. Kwok. "Trace of Planetary Nebula Evolution by Distance-independent Parameters." The Astrophysical Journal. Supplement Series 88, no. 1 (1993): 137-167. https://doi.org/10.1086/191818.
MLA (9th ed.) CitationZhang, C. Y., and S. Kwok. "Trace of Planetary Nebula Evolution by Distance-independent Parameters." The Astrophysical Journal. Supplement Series, vol. 88, no. 1, 1993, pp. 137-167, https://doi.org/10.1086/191818.
Warning: These citations may not always be 100% accurate.