Authors: UPGREN AR

Citation: Ar. Upgren, THE MEASUREMENT OF NIGHT-SKY BRIGHTNESS, Observatory, 117(1136), 1997, pp. 19-24

Authors: RATNATUNGA KU UPGREN AR

Citation: Ku. Ratnatunga et Ar. Upgren, KINEMATICS OF COMMON DWARF STARS - A MAXIMUM-LIKELIHOOD ANALYSIS, The Astrophysical journal, 476(2), 1997, pp. 811-828

Authors: UPGREN AR

Citation: Ar. Upgren, LUYTEN,WILLEM,JACOB (1899-1994), Quarterly Journal of the Royal Astronomical Society, 37(3), 1996, pp. 453-456

Authors: UPGREN AR HARLOW JJB

Citation: Ar. Upgren et Jjb. Harlow, SPACE MOTIONS OF LOW-MASS STARS .2. RADIAL-VELOCITIES, Publications of the Astronomical Society of the Pacific, 108(719), 1996, pp. 64-67

Authors: UPGREN AR

Citation: Ar. Upgren, LUYTEN,WILLEM,JACOB (1899-1994), Publications of the Astronomical Society of the Pacific, 107(713), 1995, pp. 603-605

Authors: WEIS EW UPGREN AR

Citation: Ew. Weis et Ar. Upgren, PROPER MOTION BIAS AMONG THE VYSSOTSKY SAMPLE OF NEARBY DWARFS, The Astronomical journal, 109(2), 1995, pp. 812-816