TY - JOUR AU - Föllmer, Hans AU - Protter, Philip TI - Local martingales and filtration shrinkage JO - ESAIM: Probability and Statistics PY - 2011 SP - S25 EP - S38 VL - 15 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/ps/2010023/ DO - 10.1051/ps/2010023 LA - en ID - PS_2011__15__S25_0 ER -