1. Painless lithotripsy experience of 100 patients;Philip;Lancet,1988
2. Piezo-ceramic lithotripsy of gallbladder stone. initial experience in 38 patients;Hood;Lancet,1988
3. Piezoelectric lithotripsy: clinical importance;Ell;Lancet,1988
4. Comparison of extracorporeal shockwave lithotripters. Lithotripsy II;Coleman,1987
5. H. Iro, J. Meier, N. Nitsche, et al., Extrakorporale piezoelektrische Lithotripsie von Speichelsteinen, HNO ((in press)).