“…• research motivation, stamina and creativity (BLACKBURN et al, 1978;BLACKBURN et al, 1991;BLAND & RUFFIN, 1992;FOX, 1983;RAMSDEN, 1994;RAMESH BABU & SINGH, 1998), • age (CARAYOL & MATT, 2004;FOX, 1983;KNORR et al, 1979;LEVIN & STEPHAN, 1991;WRAY, 2003), • gender (BLACKBURN et al, 1991;BORDONS et al, 2003;COLE & ZUCKERMAN, 1984;HEMLIN & GUSTAFSSON, 1996;PRPIC, 2002;RAMSDEN, 1994;SHAUMAN & XIE, 2003), • rank and professional recognition (BLACKBURN et al, 1978;BLACKBURN et al, 1991;KNORR et al, 1979;PRPIC, 2002;RAMSDEN, 1994), • the burden of other obligations, in particular teaching and administration (BAIRD, 1986;BLACKBURN et al, 1991;FOX, 1992;KNORR et al, 1979;PRPIC, 1996;RAMSDEN, 1994), Scientometrics 68 (2006) • communication with colleagues (RAMESH BABU & SINGH, 1998;VISART, 1979). …”