Col Reference --- --------- R1 Picirillo J., Stein W.L. 1978, Astron. J. 83, 971 R2 Zdanavicius J., et al. 2010, Baltic Astron. 19, 63 Back to the form
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R1 Picirillo J., Stein W.L. 1978, Astron. J. 83, 971
R2 Zdanavicius J., et al. 2010, Baltic Astron. 19, 63