7Wataha JC, Craig RG, Hanks CT, et al. The release of elements of dental casting alloys into cell-culture medium. Int J Prosthodont, 1995,8 : 228.
8Wataha JC, Nelson SK, Lockwood PE. Elemental release from dental casting alloys into biological media with and without protein. Dent Mater, 2001,17:409-414.
9A.M.Ektessabi, T. Otsuka, Y. Tsuboi, et al. Preliminary experimental result on mapping of the elemental distribution of the organic tissues surrounding titanlum-alloy implants Dent Mater,2000,16(1):57-61.
10Wataha JC, Lockwood PE. Release of elements from dental casting alloy into cell-culture medium over 10 months. Dent Res,1998,14(2):158-163.