^Kraus, Florian; Korber, Nikolaus. The chemical bond in polyphosphides: Crystal structures, the electron localization function, and a new view of aromaticity in P42- and P5-. Chemistry - A European Journal (2005), 11 (20), 5945-5959. doi:10.1002/chem.200500414.
^Bolduan, F.; Hoenle, W.; Hochheimer, H. D.; Henkel, W. Temperature and High Pressure Raman Study of M3P7 (M = Li, Na, K, Rb, Cs) Compounds. Physica Status Solidi B: Basic Research (1985), 132(1), 41-50. doi:10.1002/pssb.2221320103.
^K. Tentschev; E. Gmelin; W. Hönle (1985). Phase transitions crystalline to plastic-crystalline and the specific heat of M3P7 compounds (M = Li, Na, K, Rb, Cs). Thermochimica Acta, 85, 151–154. doi:10.1016/0040-6031(85)85552-0
^Korber, Nikolaus; von Schnering, Hans Georg. Alkali metal polyphosphides in low dimensions. Preparation and structure of [Me4N]2RbP7(NH3) and [Et4N]Cs2P11. Chemische Berichte (1996), 129(2), 155-159. doi:10.1002/cber.19961290208