Coba jelasin Lihat pula dari Efek pertentangan dong

Gehrels, T. (1956) "Photometric Studies of Asteroids. V: The Light-Curve and Phase Function of 20 Massalia". Astrophysical Journal 195: 331-338.

Gehrels, T.; Coffeen, T.; & Owings, D. (1964) "Wavelength dependence of polarization. III. The lunar surface". Astron. J. 69: 826-852.

Burrati, B. J.; Hillier, J. K.; & Wang, M. (1996) "The Lunar Opposition Surge: Observations by Clementine". Icarus 124: 490-499.