1. A sensitive directional gamma-ray detector;Cassen;UCLA Report,1949
2. A sensitive directional gamma-ray detector;Cassen;Nucleonics,1950
3. The scintillation counter in clinical studies of human thyroid physiology using I-131;Allen;J Clin Endocrinol,1951
4. The in vivo delineation of thyroid glands with an automatically scanning recorder;Cassen;UCLA Report,1951