Marcin Gonsior, Ingo Krossing, Lutz Müller, Ines Raabe, Martin Jansen, Leo van Wüllen,
PX4+, P2X5+, and P5X2+ (X=Br, I) salts of the superweak Al(OR)4- anion [R=C(CF3)3]. Chemistry: A European Journal. ,vol. 8, pp. 4475- 4492 ,(2002) ,
10.1002/1521-3765(20021004)8:19<4475::AID-CHEM4475>3.0.CO;2-M