U. Österberg

Quadriceps muscle performance in sitting and standing in young women with patellofemoral pain syndrome and young healthy women

G. Grimby, R. Thomeé, U. Svantesson, 1996, Scandinavian journal of medicine & science in sports.

Torque, work and EMG development in a heel-rise test.

G. Grimby, U. Svantesson, U. Österberg, 1998, Clinical biomechanics.