1. The grade and pathological stage of bladder cancer;Kern, W.H.;Cancer,1984
2. Classification of bladder tumours based on the cellular pattern;Bergkvist, A.; Ljungqvist, A.; Moberger, G.;Acda Chir Scand,1965
3. Tumors of the urinary bladder. In: Atlas of tumor pathology. 2nd series, fascicle 11;Koss, L.G.;Armed Forces Institute of Pathology, Washington DC,1975
4. Histological typing of urinary bladder tumours. International histological classification of tumours;World Health Organisation,1973
5. Malignancy grading of epithelial bladder tumours;Busch, C.; Engberg, A.; Norlen, B.J.; Stenkvist, B.;Scand J Urol Nephrol,1975