K. Fujii

Union of defects in the pars interarticularis of the lumbar spine in children and adolescents. The radiological outcome after conservative treatment.

K. Sairyo, S. Katoh, T. Ikata, 2004, The Journal of bone and joint surgery. British volume.

Development of spondylolytic olisthesis in adolescents.

V K Goel, K Sairyo, V. Goel, 2001, The spine journal : official journal of the North American Spine Society.