(557) Виолетта (Russian Wikipedia)

Analysis of information sources in references of the Wikipedia article "(557) Виолетта" in Russian language version.

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books.google.com

Lutz D. Schmadel. Dictionary of Minor Planet Names (англ.). — Fifth Revised and Enlarged Edition. — B., Heidelberg, N. Y.: Springer, 2003. — P. 58. — ISBN 3-540-00238-3.

Pilcher, Frederick (September 2008), "Period Determinations for 26 Proserpina, 34 Circe, 74 Galatea, 143 Adria, 272 Antonia, 419 Aurelia, and 557 Violetta", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, vol. 35, no. 3, p. 135-138, Bibcode:2008MPBu...35..135P