@misc{cryptoeprint:2011:666,
    author = {Eyal Z. Goren  and Kristin E. Lauter},
    title = {A Gross-Zagier formula for quaternion algebras over totally real fields},
    howpublished = {Cryptology ePrint Archive, Report 2011/666},
    year = {2011},
    url = {http://eprint.iacr.org/2011/666},
}