1. Advanced techniques of dressage. From the official instruction handbook of the German national equestrian federation book 2;Belton,2000
2. Strain gauge measurement of rein tension during riding: A pilot study;Clayton;Equine and Comparative Exercise Physiology,2005
3. Riding. A guide for new riders;Delano,1995
4. Rehabilitation with the aid of the horse: A collection of studies;Engel,1997
5. Balanced riding. A way to find the correct seat;Henriques,1987