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APA Citation
Constantin, D., Barnaföldi, G. G., Forgás‐Dajka, E., Kiss, C., & Verebélyi, E. (2013). test of relativity: Determination of Mercury's apsidal motion excess using transit photographic data. Astronomische Nachrichten, 334(9), 956–959. http://access.bl.uk/ark:/81055/vdc_100024868644.0x000039