Herbig, G. H.; Petrov, P. P.; Duemmler, R. (2003). "High-Resolution Spectroscopy of FU Orionis Stars". The Astrophysical Journal595 (1): 384–411. doi:10.1086/377194. Bibcode: 2003ApJ...595..384H.
Herbig, G. H.; Petrov, P. P.; Duemmler, R. (2003). "High-Resolution Spectroscopy of FU Orionis Stars". The Astrophysical Journal595 (1): 384–411. doi:10.1086/377194. Bibcode: 2003ApJ...595..384H.