“…{Wittebort, 1980 #170;Wittebort, 1978 #171;Levine, 1974 #172;Doddrell, 1972 #173;Monnerie, 1969 #174;Duboisvi. E, 1969 #175;Wallach, 1967 #176;Woessner, 1962 #177} Both free and restricted diffusion and jump-models have been extensively explored. These treatments have been comprehensively discussed in an elegant review by Daragan & Mayo.…”