Hello Sandile, do have a look at this paper, and please read the rest.

" Twenty-five years ago, the field of entrepreneurship research was in its infancy. The number of small-scale enterprises decreased until 1979 (Bruederl, Preisendoerfer & Ziegler, 1992) and consequently, research focused on bigger companies. Since 1979 the founding rate of small and medium sized enterprises has grown and particularly smaller firms showed a disproportionate rate of increase. At the same time, there has been an increase in research in this area (Low & McMillan 1988).

Although there are some good reviews on psychological entrepreneurship research

(cf. Chell, Haworth, & Brearly, 1991; Cooper & Gimeno-Gascon, 1992; Furnham, 1992), our approach is different. First, we are looking at a much larger data base; we do not just concentrate on one area (e.g. personality), but include all variables of psychological importance.....

http://cprid.com/July%202014/entre%20upload%20material/11-Psychological%20approaches%20to%20entrepreneurial%20success.pdf

try to search about leadership approaches and theories, like skills and traits approach.

thank you somuch Heng Liu and Miranda Yeoh your articles have been very helpful, just what I needed.