Rouan, D.; et al. The power of adaptive optics: a close look at a molecular cloud in NGC 2023. Monthly Notices of the Royal Astronomical Society. January 1997, 284 (2): 395–400. Bibcode:1997MNRAS.284..395R. doi:10.1093/mnras/284.2.395.
Rouan, D.; et al. The power of adaptive optics: a close look at a molecular cloud in NGC 2023. Monthly Notices of the Royal Astronomical Society. January 1997, 284 (2): 395–400. Bibcode:1997MNRAS.284..395R. doi:10.1093/mnras/284.2.395.