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(en) Donald F. Figer, Mark Morris, T. R. Geballe, R. Michael Rich, Eugene Serabyn, Ian S. McLean, R. C. Puetter et Amos Yahil, « High-Resolution Infrared Imaging and Spectroscopy of the Pistol Nebula: Evidence for Ejection », The Astrophysical Journal, vol. 525, no 2, , p. 759 (DOI10.1086/307927, Bibcode1999ApJ...525..759F, arXivastro-ph/9906479).
(en) R. M. Cutri, M. F. Skrutskie, S. Van Dyk, C. A. Beichman, J. M. Carpenter, T. Chester, L. Cambresy, T. Evans, J. Fowler, J. Gizis, E. Howard, J. Huchra, T. Jarrett, E. L. Kopan, J. D. Kirkpatrick, R. M. Light, K. A. Marsh, H. McCallon, S. Schneider, R. Stiening, M. Sykes, M. Weinberg, W. A. Wheaton, S. Wheelock et N. Zacarias, « VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) », VizieR On-line Data Catalog: II/246. Originally published in: 2003yCat.2246....0C, vol. 2246, , p. 0 (Bibcode2003yCat.2246....0C).
(en) Donald F. Figer, Mark Morris, T. R. Geballe, R. Michael Rich, Eugene Serabyn, Ian S. McLean, R. C. Puetter et Amos Yahil, « High-Resolution Infrared Imaging and Spectroscopy of the Pistol Nebula: Evidence for Ejection », The Astrophysical Journal, vol. 525, no 2, , p. 759 (DOI10.1086/307927, Bibcode1999ApJ...525..759F, arXivastro-ph/9906479).