TY - JOUR AU - Krushkal, Vyacheslav S TI - Exponential separation in 4–manifolds JO - Geometry & topology PY - 2000 SP - 397 EP - 405 VL - 4 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.2140/gt.2000.4.397/ DO - 10.2140/gt.2000.4.397 ID - GT_2000_4_1_a12 ER -