Ahmad, Usman, et al. “Public Private Partnership in Malaysia: The Differences in Perceptions on the Criticality of Risk Factors and Allocation of Risks Between the Private and Public Sectors”. International Review of Management and Marketing, vol. 7, no. 2, Mar. 2017, pp. 138-50, https://econjournals.com/index.php/irmm/article/view/3983.