XXXVI Polish Astronomical Society Meeting 2013: Proceedings ...
PTA
... Digital Sky Survey, MNRAS 343, 978 (2003) Asteroids in Retrograde Orbits:
Interesting Cases Pawel Kankiewicz1 and Ireneusz 166⋆ PTA Proceedings ⋆
December, 2014⋆ vol. 1 pta.edu.pl/proc/36pta/v1p164 Zuzanna Kostrzewa-
Rutkowska.