Sahai, Raghvendra; Sánchez Contreras, Carmen; Morris, Mark (2005), "A Starfish Preplanetary Nebula: IRAS 19024+0044", The Astrophysical Journal, 620 (2), ss. 948-960, Bibcode:2005ApJ...620..948S, doi:10.1086/426469
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Sahai, Raghvendra; Sánchez Contreras, Carmen; Morris, Mark (2005), "A Starfish Preplanetary Nebula: IRAS 19024+0044", The Astrophysical Journal, 620 (2), ss. 948-960, Bibcode:2005ApJ...620..948S, doi:10.1086/426469
Kastner, J. H. (2005), "Near-death Transformation: Mass Ejection in Planetary Nebulae and Protoplanetary Nebulae", American Astronomical Society Meeting 206, #28.04; Bulletin of the American Astronomical Society, cilt 37, s. 469, Bibcode:2005AAS...206.2804K