1. Spherical proportional counters;Biavati,1967
2. Ionization chambers;Boag,1966
3. Braby, L. A. (1971). Ionization in microscopic volumes irradiated by energetic photons. Thesis, Oregon State University, Corvallis, Oregon.
4. Energy deposition spectra of 14C beta radiation in a uniform medium;Braby;Radiat. Res.,1970
5. Statistics of the electron-multiplication process in proportional counters;Byrne;Proc. Roy. Soc., Ser. A,1962