@inproceedings{sgem2013s17035,
  title = {THEORY OF SONICS: EVOLUTION OF AN IDEA},
  author = {George Aurel Popescu},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on ENERGY AND CLEAN TECHNOLOGIES},
  year = {2013},
  pages = {},
  publisher = {Stef92 Technology},
  doi = {10.5593/sgem2013/bd4/s17.035}
}