1. Mardjetko S, Albert T, Andersson G, Bridwell K, DeWald C, Gaines R, Geck M, Hammerberg K, Herkowitz H, Kwon B, Labelle H, Lubicky J, McAfee P, Ogilvie J, Shufflebarger H, Whitesides T (2005) Spine/SRS Spondylolisthesis Summary Statement. Spine, 30(6 Suppl):S3
2. Labelle H, Roussouly P, Berthonnaud E et al (2005) The importance of spinopelvic balance in L5-S1 developmental spondylolisthesis: a review of pertinent radiologic measurements. Spine 30(suppl):27–34
3. Wiltse LL, Newman PH, Macnab I (1976) Classification of spondylolysis and spondylolisthesis. Clin Orthop 117:23–29
4. Marchetti PC, Bartolozzi P (1997) Classification of spondylolisthesis as a guideline for treatment. In: Bridwell KH, DeWald RL, Hammerberg KW, et al., (eds) The textbook of spinal surgery, 2 edn. Lippincott-Raven, Philadelphia pp 1211–1254
5. Labelle H, Roussouly P, Berthonnaud E, Mac-Thiong JM, Hresko T, Dimar, J, Parent S, Weidenbaum M, Brown C, Hu S (2009) Spondylolisthesis classification based on spino-pelvic alignment, Podium presentation at the 2009 Scoliosis Research Society Annual Meeting, San Antonio, USA