Terahertz time-domain measurements by electro-optic crystals with various symmetries I.E. Ilyakov, G.Kh. Kitaeva, B.V. Shishkin and R.A. Akhmedzhanov EPJ Web Conf., 149 (2017) 05004 Published online: 04 August 2017 DOI: 10.1051/epjconf/201714905004