请检查|date=中的日期值 (帮助) J. M. Weiberg and J. H. Taylor. Observations of Post-Newtonian Timing Effects in the Binary Pulsar PSR 1913+16. Physical Review Letters
(原始内容存档于2023-05-28) (英语). The recently recognized failure of predictability in Newtonian dynamics. Proceedings of the Royal Society of London. A. Mathematical