https://commons.ru.ac.za/vital/access/manager/Index en-us 5 Modifcations to gravitational waves due to matter shells https://commons.ru.ac.za/vital/access/manager/Repository/vital:45062 Wed 06 Apr 2022 14:31:01 SAST ]]> Numerical evolution of plane gravitational waves https://commons.ru.ac.za/vital/access/manager/Repository/vital:44977 Fri 04 Feb 2022 14:37:49 SAST ]]>