Energetics of a discrete interfaceG. Ord; J.K. Percus; M.Q. Zhang · 1988

A reply to the final commentCliff, A.D.; Martin, R.L.; Ord, J.K. · Regional Studies · 1976

Evaluating the friction of distance parameter in gravity modelsCliff, A.D.; Martin, R.L.; Ord, J.K. · Regional Studies · 1974

D-optimum designs for the linear logistic model when restrictions exist on pJoseph A. Scazzero; J.K. Ord · 1993

Map pattern and friction of distance parameters: reply to comments by R. J. Johnston, and by L. Curry, D. A. Griffith and E. S. SheppardCliff, A.D.; Martin, R.L.; Ord, J.K. · Regional Studies · 1975