Preliminary results of Sr/Ca ratio study of teeth samples by photoactivation analysis Yusuf Kavun, Ismail Boztosun, Ismail Maraş, Haris Ðapo and Christian Segebade EPJ Web Conf., 128 (2016) 02001 Published online: 15 November 2016 DOI: 10.1051/epjconf/201612802001