Randomized, controlled, crossover study of self-administered jacobson relaxation in chronic, nonspecific, low-back pain

1. Mateu, M.
2. Alda, O.
3. Inda, M.-D.-M.
4. Margarit, C.
5. Ajo, R.
6. Morales, D.
7. Van-Der Hofstadt, C.J.
8. Peiro, A.M.