Kirk J. Ziegler Leon S. Lasdon Jerzy Chlistunoff Keith P. Johnston Optimization Models for Determining Nitric Acid Equilibria in Supercritical Water. 421-434 1999 23 Computers & Chemistry 5 http://dx.doi.org/10.1016/S0097-8485(99)00027-3 db/journals/candc/candc23.html#ZieglerLCJ99