Porter, D., Michael, S., & Kirkwood, C. (2008). Patterns of postural deformity in non-ambulant people with cerebral palsy: What is the relationship between the direction of scoliosis, direction of pelvic obliquity, direction of windswept hip deformity and side of hip dislocation? Sage.

Porter, David, Shona Michael, a Craig Kirkwood. Patterns of Postural Deformity in Non-ambulant People With Cerebral Palsy: What Is the Relationship between the Direction of Scoliosis, Direction of Pelvic Obliquity, Direction of Windswept Hip Deformity and Side of Hip Dislocation? Sage, 2008.

Porter, David, Shona Michael, a Craig Kirkwood. Patterns of Postural Deformity in Non-ambulant People With Cerebral Palsy: What Is the Relationship between the Direction of Scoliosis, Direction of Pelvic Obliquity, Direction of Windswept Hip Deformity and Side of Hip Dislocation? Sage, 2008.