Marsell, Richard, et al. “Mice Expressing a Constitutively Active PTH PTHrP Receptor in Osteoblasts Show Reduced Callus Size But Normal Callus Morphology During Fracture Healing”. Acta Orthopaedica, vol. 78, no. 1, Jan. 2007, pp. 39-45, doi:10.1080/17453670610013402.