1. Optimum network VAR planning by nonlinear programming;Billington;IEEE Trans.,1973
2. Network constrained reactive power control using linear programming;Hobson;IEEE Trans.,1980
3. Optimal reactive power planning;Hughes;IEEE Trans.,1981
4. Optimization of reactive volt-ampere (VAR) sources in system planning;Lebow,1984
5. Optimal var planning by approximation method for recursive mixed integer linear planning;Aoki;IEEE Trans.,1988