Bart Koes, Geert Van Der Heijden, Pim Assendelft, Lex Bouter, Paul Knipschild
Koes B, Van Der Heijden G, Assendelft P, Bouter L, Knipschild P.
Spinal manipulation and mobilisation for back and neck pain: Authors' reply
British Medical Journal 1992; 304 :185
doi:10.1136/bmj.304.6820.185