M. Zarabian, H. Razmi, MR. Sharifian, D. Sharifi, F. Sasani, A. Mousavi. "An Investigation on the Histologic Responses of Periapical Tissues Following Retrofilling with Root MTA and Portland Cement Type I Versus Pro Root MTA in the Canine Teeth of Cats ". Front Dent. 1;1(4):31-38.