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T. Sauerbruch, G. Paumgartner, M. Sackmann, 1991, Gut.

The lessons from in vitro lithotripsy for the clinical treatment of gallstones.

A. Johnson, N. Bird, R. Kanaris-Sotiriou, 1989, Journal of hepatology.

Cost effectiveness of adjuvant bile salt treatment in extracorporeal shock wave lithotripsy for the treatment of gall bladder stones.

J. Nicholl, P. Milner, A. Johnson, 1994, Gut.

[A staged program for treatment of headache syndromes with low dose acetylsalicylic acid].

U. Frick, G. Frick, K. Brachmann, 1991, Zeitschrift fur arztliche Fortbildung.

Randomised controlled trial of cost-effectiveness of lithotripsy and open cholecystectomy as treatments for gallbladder stones

J. Nicholl, J. Brazier, P. Milner, 1992, The Lancet.