TG. Goergen, A. Taylor; N. Alazraki, The missing kidneys sign: a minfestation on bone scan of widespread metastatic disease., in Nuklearmedizin, vol.15, n.4, agosto 1976, pp.204-5, PMID980799.
A. Gentili, SD. Miron; LP. Adler; EM. Bellon, Incidental detection of urinary tract abnormalities with skeletal scintigraphy., in Radiographics, vol.11, n.4, luglio 1991, pp.571-9, PMID1887112.