1. Waddington , W. , and
Erskine , J.B. ( 1973 ), UKAEA and NPL Int. Symp. "Vibration Problems in Industry" , Keswick , England , Paper 211
2. Priestman , G.H. ( 1979 ), Ph.D. Thesis , University of Sheffield .
3. Pulsations in sieve-tray and bubble-cap distillation towers