1. Flow characteristics and pressure dependence of very small vacuum leaks;Troutner,1962
2. Measurement of leaks in Hermetically sealed containers using Kr-85;Berry;A.E.R.E. Report R3704,1962
3. Vacuum equipment and techniques;Guthrie,1949
4. The krypton-85 leak test;Murgatroyd;A.W.R.E. Report 022/68,1968