M. F. Lappert; M. J. Slade; A. Singh; J. L. Atwood; R. D. Rogers; R. Shakir. Structure and reactivity of sterically hindered lithium amides and their diethyl etherates: crystal and molecular structures of [Li{N(SiMe3)2}(OEt2)]2 and tetrakis(2,2,6,6-tetramethylpiperidinatolithium). Journal of the American Chemical Society. 1983, s. 302–304. DOI10.1021/ja00340a031.