“…Bullock, 1955, Naylor, 1963, Reynolds & Casterlin, 1979, Casterlin & Reynolds, 1980, McLachlan & Young, 1982, DeSmet, 1985, McBride et al, 1989, Svetlichnyi, 1989, Widdows, 1973, ηελ αλάπηπμε (π.ρ. Bourne & Smith, 1972, Landry, 1975, Akesson, 1977, Branford, 1978a,b, Dawirs, 1979, Al-Habbib & Grainger, 1981, Clarke, 1982, Anger, 1983, Palmegiano &. D'Apote, 1983, Pechenik, 1984a,b, Lima & Pechenik, 1985, Blaszkowski & Moreira, 1986, Dawirs & Dietrich, 1986, Bhaud, 1988, Jamieson & Burns, 1988, Hann, 1989,Al-Tikrity & Grainger1990, Charmantier & Mounet, 1992, ηε δηαηξνθή (π.ρ.…”