GRIMES, RW; CATLOW, CRA; STONEHAM, AM; (1989) A COMPARISON OF DEFECT ENERGIES IN MGO USING MOTT-LITTLETON AND QUANTUM-MECHANICAL PROCEDURES. J PHYS-CONDENS MAT , 1 (40) 7367 - 7384. 10.1088/0953-8984/1/40/011. Green open access