{{Cite journal| doi = 10.1016/j.strueco.2020.06.004| issn = 0954349X| volume = 55| pages = 59–73| last1 = Rikap| first1 = Cecilia| last2 = Flacher| first2 = David| title = Who collects intellectual rents from knowledge and innovation hubs? questioning the sustainability of the singapore model| journal = Structural Change and Economic Dynamics| access-date = 2021-02-18| date = 2020-12| url = https://linkinghub.elsevier.com/retrieve/pii/S0954349X20303763}}