Levy, Sophia H. (Ağustos 1939), "Mean Elements and Perturbations by the Berkeley Tables of Minor Planets of the Hecuba Group", Publications of the Astronomical Society of the Pacific, 51 (302), s. 225, Bibcode:1939PASP...51..224L, doi:10.1086/125066.
Zhang, Xi-Liang; Wang, Xiao-Bin; Zhang, Li-Yun (Aralık 2006), "CCD Photometry of Asteroid (147) Protogeneia", Chinese Journal of Astronomy & Astrophysics, 6 (6), ss. 729-732, Bibcode:2006ChJAA...6..729Z, doi:10.1088/1009-9271/6/6/12.
harvard.edu
adsabs.harvard.edu
Buchheim, Robert K. (Haziran 2005), "Lightcurve of 147 Protogeneia", The Minor Planet Bulletin, 32 (2), ss. 35-36, Bibcode:2005MPBu...32...35B, ISSN1052-8091.
Levy, Sophia H. (Ağustos 1939), "Mean Elements and Perturbations by the Berkeley Tables of Minor Planets of the Hecuba Group", Publications of the Astronomical Society of the Pacific, 51 (302), s. 225, Bibcode:1939PASP...51..224L, doi:10.1086/125066.
Bel'Skaya, I. N.; Kiselev, N. N.; Lupishko, D. F.; Chernova, G. P. (1991), "Polarimetry of CMEU asteroids. II. A peculiarity of M-type asteroids", Kinematics and Physics of Celestial Bodies, 7 (6), ss. 8-11, Bibcode:1991KPCB....7f...8B.
Zhang, Xi-Liang; Wang, Xiao-Bin; Zhang, Li-Yun (Aralık 2006), "CCD Photometry of Asteroid (147) Protogeneia", Chinese Journal of Astronomy & Astrophysics, 6 (6), ss. 729-732, Bibcode:2006ChJAA...6..729Z, doi:10.1088/1009-9271/6/6/12.
Buchheim, Robert K. (Haziran 2005), "Lightcurve of 147 Protogeneia", The Minor Planet Bulletin, 32 (2), ss. 35-36, Bibcode:2005MPBu...32...35B, ISSN1052-8091.