Justus Ngala Agumba 
- (2020): Establishing Core Factors of Risk Management Influencing Performance Outcome of Small and Medium Firm's Construction Projects in Gauteng. Dans: Journal of Construction in Developing Countries, v. 25, n. 2 (15 décembre 2020).
- (2020): Underlying structures of risk response measures among small and medium contractors in South Africa. Dans: Construction Economics and Building, v. 20, n. 1 (mars 2020).
- (2019): Evaluating the relationship between communication management practices and project outcomes: a case study of Eswatini (Swaziland) construction industry. Dans: Construction Economics and Building, v. 19, n. 2 (novembre 2019).
- (2018): Critical success factors influencing performance outcome of joint venture construction projects in South Africa: Comparison of first and second order models. Dans: Construction Economics and Building, v. 18, n. 3 (octobre 2018).
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