2,3 Rindler (1977), pp. 43 Koks (2006), section 7.1 Fraundorf (2012), section IV-B PhysicsFAQ (2016), see external links.
2,3 Rindler (1977), pp. 43 Koks (2006), section 7.1 Fraundorf (2012), section IV-B PhysicsFAQ (2016), siehe Weblinks.