1. Bergmann R.L., Frisch N.W., US Patent 3293268, 1996, assigned to Princeton Chemical Research.
2. Catalyst Technology Roadmap Report Technology Vision 2020/The US Chemical Industry, held from a Workshop held 20–21 March 1997, at the ACS Headquarters, Washington, DC, USA.
3. Crystallochemistry of VPO phases and application to catalysis
4. Mechanistic aspects of maleic anhydride synthesis from C4 hydrocarbons over phosphorus vanadium oxide