SpringerLink (Online service) & Schmidt, B. G. (2000). Einstein's Field Equations and Their Physical Implications: Selected Essays in Honour of Jürgen Ehlers (1st ed. 2000.). Springer Berlin Heidelberg : Imprint: Springer. https://doi.org/10.1007/3-540-46580-4
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service) και Bernd G. Schmidt. Einstein's Field Equations and Their Physical Implications: Selected Essays in Honour of Jürgen Ehlers. 1st ed. 2000. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 2000. https://doi.org/10.1007/3-540-46580-4.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service) και Bernd G. Schmidt. Einstein's Field Equations and Their Physical Implications: Selected Essays in Honour of Jürgen Ehlers. 1st ed. 2000. Springer Berlin Heidelberg : Imprint: Springer, 2000. https://doi.org/10.1007/3-540-46580-4.
