The 'Dirac Beep' in this short novella (1973): https://en.wikipedia.org/wiki/The_Quincunx_of_Time https://en.wikipedia.org/wiki/The_Quincunx_of_Time Also, the

The 'Dirac Beep' in this short novella (1973): https://en.wikipedia.org/wiki/The_Quincunx_of_Time https://en.wikipedia.org/wiki/The_Quincunx_of_Time Also, the concept of causality itself is a kind of underlying theme in Hannu Rajaniemi's "The Causal Angel" (2014) (3rd of a series).