Armand R. Groffman and Laura J. Crossey (1999): Transient redox regimes in a shallow alluvial aquifer. Chemical Geology 161: 415-442.

Richard M. Ortiz, Armand Groffman, and Laura J. Crossey (1999):   Seasonal Geochemical Response of a Shallow Alluvial Aquifer Associated with a First Order Montane Stream in Northern New Mexico.   

Armand Groffman, and Laura J. Crossey (1998):   The upper water table: a chemically reactive zone with respect to contaminant fate and mobility.