Pathology. December 1994, 145 (6): 1496–508. PMC 1887493 . PMID 7992852. Franke, M. Statistische Untersuchungen über die senilen Drusen im menschlichen
Fulton, William. The Regional City. Island Press. April 10, 2013: xii. Urban Land Institute: "C. Nichols Prize Winner—Peter Calthorpe" by Leigh Franke (页面存档备份,存于互联网档案馆)