@ARTICLE{implementation2012,
     Title={Implementation of 3-D ray tracing propagation model for indoor wireless communication},
     Author={Singh, Satvir and Khosla, Arun and Sharma, Ashita},
     Journal={International Journal of Electronics Engineering},
     Volume={4},
     Number={1},
     Pages={43--47},
     Publisher={Serial Publishers},
     Year={2012}
}