The LHCb experiment collected during run I the world's largest sample of
charmed hadrons. This sample is used to search for CP violation in charm and
for the measurements of D0 mixing parameters. The measurement of the D0 to
D0bar mixing parameters and the search for indirect CP-violation in two-body
charm decays at LHCb experiment are presented.Comment: Proceedings of the 8th International Workshop on the CKM Unitarity
Triangle (CKM 2014), Vienna, Austria, September 8-12, 201