Grady C A, Schneider G, Sitko M L, Williger G M, Hamaguchi K, Brittain S D, Ablordeppey K, Apai D, Beerman L, Carpenter W J, et al. Revealing the Structure of a Pre-Transitional Disk: The Case of the Herbig F Star SAO 206462 (HD 135344B). \apj. 2009;699 (2) :1822-1842.