1. Cytology of voided urine with special reference to 'benign' papilloma and some of the problems encountered in the preparation of smears;Crabbe, J.G.S.;Acta cytol. (Philad.),1961
2. An evaluation of routine cytological examination of the urine;Cullen, T.H.; Popham, R.R.; Voss, H.J.;Brit. J. Urol,1967
3. Exfoliative cytology of urinary sediments. A review of 2,829 cases;Foot, N.C.; Papanicolaou, G.N.; Holmquist, N.D.; Seybolt, J.F.;Cancer (Philad.),1958
4. Local recurrence of bladder cancer after supervoltage irradiation;Goodman, G.B.; Balfour, J.;J. Canad. Ass. Radiol,1964
5. Cytologic evaluation of transitional cell carcinoma of the bladder;Kern, W.H.; Bales, C.E.; Webster, W.W.;J. Urol. (Baltimore),1968