Schuetrumpf, A., Bulut, A., Hermer, N., Zorlu, Y., et.al., "From Tetrahedral Tetraphosphonic Acids E[p-C6H4P(O)(OH)(2)](4) (E=C, Si) to Porous Cu- and Zn-MOFs with Large Surface Areas", Chemistryselect, 2, 10, 3035-3038, 2017.