Kox & Schatz 2021, p. 38. Kox, Anne J.; Schatz, H. F. (2021). "A living work of art": the life and science of Hendrik Antoon Lorentz (1st ed.). Oxford: Oxford University Press. p. 38. ISBN978-0-19-887050-0. OCLC1194958040.
Kox & Schatz 2021, p. 39. Kox, Anne J.; Schatz, H. F. (2021). "A living work of art": the life and science of Hendrik Antoon Lorentz (1st ed.). Oxford: Oxford University Press. p. 38. ISBN978-0-19-887050-0. OCLC1194958040.
Kox & Schatz 2021, pp. 42–44. Kox, Anne J.; Schatz, H. F. (2021). "A living work of art": the life and science of Hendrik Antoon Lorentz (1st ed.). Oxford: Oxford University Press. p. 38. ISBN978-0-19-887050-0. OCLC1194958040.
Kox & Schatz 2021, p. 257. Kox, Anne J.; Schatz, H. F. (2021). "A living work of art": the life and science of Hendrik Antoon Lorentz (1st ed.). Oxford: Oxford University Press. p. 38. ISBN978-0-19-887050-0. OCLC1194958040.