Kogan, F. Disaster Forewarning Diagnostic Methods and Management. SPIE Digital Library.
Chicago-čujuhus (17. p.)Kogan, Felix. Disaster Forewarning Diagnostic Methods and Management. SPIE Digital Library.
MLA-čujuhus (9. p.)Kogan, Felix. Disaster Forewarning Diagnostic Methods and Management. SPIE Digital Library.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.