Authors: ARKHIPOVA VP KOSTYAKOVA EB NOSKOVA RI

Citation: Vp. Arkhipova et al., THE STUDY OF PHOTOMETRIC VARIABILITY OF 7 PLANETARY-NEBULAE IN 1989-1993, Astronomy letters, 20(1), 1994, pp. 99-103

Authors: KOSTYAKOVA EB

Citation: Eb. Kostyakova, THE MEAN INTEGRATED UBV MAGNITUDES OF 7 PLANETARY-NEBULAE FROM 1968 TO 1988, Soviet astronomy letters, 18(5), 1992, pp. 324-326