@article{PismaZhETF.22.140, title = {Direct measurement of the magnetic and deformation contribution to birefringence in the weakly-ferromagnetic phase of hematite ($\alpha-Fe_2O_3$)}, author = {Merkulov, V. S. and Rudashevskii, E. G. and LeGalle, A.}, journal = {πΙΣΨΝΑ Χ φότζ}, volume = {22}, issue = {3}, pages = {140}, year = {1975}, doi = {}, url = {http://jetpletters.ru/ps/0/article_23279.shtml}, }