TY - JOUR AU - Qianyun Miao TI - Symplectic non-squeezing for mass subcritical fourth-order Schrödinger equations JO - Colloquium Mathematicum PY - 2017 SP - 137 EP - 164 VL - 149 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm7088-11-2016/ DO - 10.4064/cm7088-11-2016 LA - en ID - 10_4064_cm7088_11_2016 ER -