Pilcher, Frederick (octombrie 2011), „Rotation Period Determinations for 11 Parthenope, 38 Leda, 111 Ate 194 Prokne, 217 Eudora, and 224 Oceana”, Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, 38 (4), pp. 183–185, Bibcode:2011MPBu...38..183P.