O'dell, C. R.; Wen, Zheng; Hu, Xihai. Discovery of New Objects in the Orion Nebula on HST Images: Shocks, Compact Sources, and Protoplanetary Disks. Astrophysical Journal. June 1993, 410: 696. Bibcode:1993ApJ...410..696O. ISSN 0004-637X. doi:10.1086/172786(英语).
Laques, P.; Vidal, J. L. Detection of a new kind of condensations in the center of the Orion Nebula, by means of S 20 photocathodes associated with a Lallemand electronic camera.. Astronomy & Astrophysics. March 1979, 73: 97–106. Bibcode:1979A&A....73...97L. ISSN 0004-6361(英语).
O'dell, C. R.; Wen, Zheng; Hu, Xihai. Discovery of New Objects in the Orion Nebula on HST Images: Shocks, Compact Sources, and Protoplanetary Disks. Astrophysical Journal. June 1993, 410: 696. Bibcode:1993ApJ...410..696O. ISSN 0004-637X. doi:10.1086/172786(英语).
Laques, P.; Vidal, J. L. Detection of a new kind of condensations in the center of the Orion Nebula, by means of S 20 photocathodes associated with a Lallemand electronic camera.. Astronomy & Astrophysics. March 1979, 73: 97–106. Bibcode:1979A&A....73...97L. ISSN 0004-6361(英语).
O'dell, C. R.; Wen, Zheng; Hu, Xihai. Discovery of New Objects in the Orion Nebula on HST Images: Shocks, Compact Sources, and Protoplanetary Disks. Astrophysical Journal. June 1993, 410: 696. Bibcode:1993ApJ...410..696O. ISSN 0004-637X. doi:10.1086/172786(英语).