Helgeson, H.C., Knox, A.M., Owens, C.E., and Shock, E.L. (1993) Petroleum, oil field waters, and authigenic mineral assemblages: Are they in metastable equilibrium in hydrocarbon reservoirs?: Geochimica et Cosmochimica Acta, v. 57, p. 3295-3339.

Helgeson, H.C. and Amend, J.P. (1994) Relative stabilities of biomolecules at high temperatures and pressures: Thermochimica Acta, v. 245, p. 89-119.

Ransom, B. and Helgeson, H.C. (1995) A chemical and thermodynamic model of dioctahedral 2:1 layer clay minerals in diagenetic processes: dehydration of dioctahedral aluminous smectite as a function of temperature and depth in sedimentary basins: Am. J. Sci., v. 295, p. 245-281.

Amend, J.P. and Helgeson, H.C. (1996) Group additivity equations of state for calculating the standard molal thermodynamic properties of aqueous organic species at elevated temperatures and pressures: Geochimica et Cosmochimica Acta (in press)

Richard, L. and Helgeson, H.C. (1996) Calculation of the thermodynamic properties at elevated temperatures and pressures of high molecular weight solid and liquid hydrocarbons in kerogen and bitumen: Geochimica et Cosmochimica Acta (in press).