@ARTICLE{range-free2015,
     Title={Range-free 3D node localization in anisotropic wireless sensor networks},
     Author={Rose, Anil and Khosla, Arun and Saini, Jasbir Singh and Singh, Satvir},
     Journal={Applied Soft Computing},
     Volume={34},
     Number={0},
     Pages={438--448},
     Publisher={Elsevier},
     Year={2015}
}