Before revision: He worked under the supervision of professor Nicolas Ambraseys and obtained his PhD degree in 1968; being the first PhD degree awarded by the Imperial College Engineering Seismology Section (followed by Dimitri Papastamatiou in 1971Dimitri Papastamatiou).
After revision: He worked under the supervision of professor Nicholas Ambraseys and obtained his PhD degree in 1968; being the first PhD degree awarded by the Imperial College Engineering Seismology Section (followed by Dimitri Papastamatiou in 1971Dimitri Papastamatiou).