| # | View | Authors | Title | Publication | Place | Vol | No | Pages | Year | Language | |||||
| Ori | Tra | ||||||||||||||
| 112 | • | V.A. Ambartsumian, B.E. Markarian | Stellar Association around P Cygni | Communications of the Byurakan Observatory | 2 | 3-17 | 1949 | Russian | |||||||
| 131 | V.A. Ambartsumian, B.E. Markarian | The Stellar Association around P Cygni | Abhandlungen Aus Der Sowjetischen Astronomie, Folge 1. Otto Singer. Berlin: Verlag Kultur und Fortschritt | Berlin | 43-53 | 1951 | German | ||||||||