. "Lorentz's 1904 theory of electromagnetic phenomena" . . "History of special relativity#Relativity principle and light constancy" . "history of special relativity" . "primary sources" . . "Poincar\u00E9's electrodynamic theory" . "History of special relativity#Spacetime physics" . "History of special relativity#References" . . "Heaviside ellipsoid" . . "special theory of relativity" . "History of special relativity" . "History of special relativity" . "History of special relativity#Experiments by Fizeau and Sagnac" .