... order, Gad- el- Hak and Blackwelder (19 87b; 19 89), Lumley (19 91; 19 96), Choi et al. (19 92), Reynolds (19 93), Jacobson and Reynolds (19 93a; 19 93b; 19 94; 19 95; 19 98), Gad- el- Hak (19 93; 19 94; 19 96; 19 98; ... others, Bushnell (19 83; 19 94); Wilkinson et al. (19 88); Bushnell and McGinley (19 89); Gad- el- Hak (19 89; 2000); Bushnell and Hefner (19 90); Fiedlerand Fernholz (19 90); Gad- el- Hak and Bushnell ... Laufer, 19 75; Willmarth, 19 75a; 19 75b; Saffman, 19 78; Cantwell, 19 81; Fiedler, 19 86; 19 88; Blackwelder, 19 88; 19 98; Robinson, 19 91; Delville et al., 19 98]. The paper by Robinson (19 91) in particular...