Flexible-Boundary Quantum-Mechanical/Molecular-Mechanical Calculations:? Partial Charge Transfer between the Quantum-Mechanical and Molecular-Mechanical Subsystems.
Zhang Y, Lin H. Flexible-Boundary Quantum-Mechanical/Molecular-Mechanical Calculations:? Partial Charge Transfer between the Quantum-Mechanical and Molecular-Mechanical Subsystems. J Chem Theory Comput. 2008 Mar; 4(3):414-25.