Surgery and involutions on 4-manifolds. Krushkal, Vyacheslav S. — 2005 Algebraic & Geometric Topology
Subexponential groups in 4-manifold topology. Krushkal, Vyacheslav S.; Quinn, Frank — 2000 Geometry & Topology
Alexander duality, gropes and link homotopy. Krushkal, Vyacheslav S.; Teichner, Peter — 1997 Geometry & Topology