K. C. Kumara Swamy, Gangadhararao, G., Srinivas, V., Kumar, N. N. Bhuvan, Balaraman, E., and Chakravarty, M., ?Cyclodiphosph(III)azane chemistry ? ylides from the reaction of [(RNH)P-N(t-Bu)]2 [R = t-Bu, i-Pr] with dimethyl maleate and chiral ansa-type derivatives from reaction of [ClP-N(t-Bu)]2 with a substituted BINOL?, Inorganica Chimica Acta, vol. 372, no. 1, pp. 374?382, 2011.