M.W.H. Leung, Crelis Ferdinand Rammelt (2018) Final findings: Feeder road development, pdf

Crelis Ferdinand Rammelt (2016) Feeder road development: Addressing the inequalities in mobility and accessibility, pdf

Crelis Ferdinand Rammelt, M.W.H. Leung (2015) From Growth to Equitable Sustainable Development. Consultation Contribution for the Dutch Ministry of Foreign Affairs to promote inclusiveness, p. 102-103, url