1. Progri , I. F. Michalson , W. R. Orr , J. Cyganski , D. A system for tracking and locating emergency personnel inside buildings September 2000 560 568
2. Progri , I. F. Michalson , W. R. Bromberg , M. C. A DSSS/CDMA/FDMA indoor geolocation system Proc. ION-GPS September 2002 155 164
3. Progri , I. F. An assessment of indoor geolocation systems Ph.D. Dissertation Worcester Polytechnic Institute May 2003
4. Progri , I. F. Michalson , W. R. An investigation of a DSSS-OFDM-CDMA-FDMA indoor geolocation system April 2004 662 670
5. An OFDM/FDMA indoor geolocation system;Progri;NAVIGATION J. Inst. Nav.,Summer 2004