^ 1.01.1Dipl.-Chem. K. Schlesinger, Dr. B. Ziemer, Dr. habil. W. Hanke, Dr. G. Ladwig. Über die Diphosphate M4(P2O7)3 mit M = V, Cr und die Elektronenspektren von Vanadium (III)- und Chrom(III)-Phosphaten(德文). Z. anorg. allg. Chem, 1983. 500: 104-116. doi:10.1002/zaac.19835000514.
^Dr. K. K. Palkina, Dr. S. I. Maksimova, Dr. N. T. Chibiskova, K. Schlesinger, Dr. G. Ladwig. Doppeloktaeder-Cluster [V2O9] in der Kristallstruktur von Vanadium(III)-diphosphat, V4(P2O7)3(德文). 1985. 529 (10): 89-96. doi:10.1002/zaac.19855291013.
^Teterevkov, A. I.; Mel'nikova, R. Ya.; Pechkovskii, V. V.; Mikhailovskaya, G. K. IR spectra of some vanadium phosphates(俄文). Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy, 1979. 15 (8): 1428-1431. ISSN0002-337X
^Glaum, Robert. Understanding and predicting the color of anhydrous transition metal (III) phosphates using the angular overlap model. Phosphorus Research Bulletin. 1999, 10: 144–149. doi:10.3363/prb1992.10.0_144.
^S.M. Al-Zahrani, N.O. Elbashir, A.E. Abasaeed & M. Abdulwahed. Oxidative dehydrogenation of isobutane over pyrophosphates catalytic systems. Catalysis Letters, 2000. 69: 65-70. doi:10.1023/A:1019057503762.