Roy E. Bickelhaupt

Predicting fly ash resistivity—an evaluation

Leslie E. Sparks, Roy E. Bickelhaupt, 1981 .

Surface Resistivity and the Chemical Composition of Fly Ash

Roy E. Bickelhaupt, 1975 .

A method for predicting the effective volume resistivity of a sodium depleted fly ash layer

Ralph F. Altman, Roy E. Bickelhaupt, 1984 .