1. On Edwards' criterion of seasonality and a non-parametric alternative;Hewitt;Br. J. Prev. Soc. Med.,1971
2. Is spontaneous abortion a seasonal problem?;Koras;Obstet. Gynecol.,1960
3. Urolithiasis in general practice: an epidemiological study from a Norwegian district;Laerum;Scand. J. Urol. Nephrol.,1983
4. Seasonal variation in the occurrence of testicular torsion at Chandigarh, India;Malakondiah;Indian J. Urol.,1986