1. problems. Physician and Sportsmedicine,1988
2. Sp Med;Br, J.,1994
3. The Genuine works of Hippocrates;Adams, F.
4. Solomon GD, Freitag FG. Headache in sport;Diamond, S.,1989
5. Headache in Sport;Atkinson, R, Appenzellar 0;Seminars in Neurology,1981