1. Technique of examination of exposed kidneys;Äkerlund;Acta chiv. Scandinar,1937
2. Points in technique of operative removal of kidney stones;Beer;Ann. Surg.,1928
3. Roentgenological control of exposed kidneys in operations for nephrolithiasis with use of special intensifying cassette;Beer;J. Urol.,1931
4. Nephrectomy versus conservative operation in unilateral calculous disease of upper urinary tract;Oppenheimer;Surg., Gynec. and Obst.,1937
5. Operative x-ray control in surgical treatment of renal calculi;Oppenheimer;J. Mt. Sinai Hospital,1938