Composition and properties of thermophosphates from apatite and aluminosilicatesTõnsuaadu, Kaia; Rimm, Karel; Veiderma, MihkelPhosphorus, sulfur and silicon1993 / p. 73-81: ill Unexpected reactivity of ethyl 2-(diethylphosphono)propionate toward 2,2-disubstituted-1,3-cyclopentanedionesAav, Riina; Kanger, Tõnis; Pehk, Tõnis; Lopp, MargusPhosphorus, sulfur and silicon2005 / p. 1739-1748 https://www.tandfonline.com/doi/full/10.1080/10426500590885309