@article{WaB3:02,
  author =  {F. Wang and V. Balakrishnan and P. Zhou and J. Chen and 
             R. Yang and C. Frank }, 
   title = {Optimal Array Pattern Synthesis Using Semidefinite
  Programming},
   volume = 51,
   number = 5,
   pages = {1172-1183},
   month = may,
   journal = tsp,
   year=2003
}