1. In search of useful theory of innovation
2. Innovation: Mapping the winds of creative destruction
3. Technological paradigms and technological trajectories
4. 5. Vergragt, Philip, Mulder, Karel, Rip Arie, and Ham Lente , (1989 ),?De matrijs van verwachtingen, ingevuld voor de polymeren Tenax en Twaron?, (?The matrix of expectations, filled up for the polymers Tenax and Twaron?) report for the?Nederlandse Organisatie voor Technologic Aspectenonderzoek?, (Netherlands Organization for Technology Assessment), May Lente, Harro van and Mulder, Karel (1989),?The matrix of expectations, filled up for the polymers Tenax and Twaron?, paper for EASST workshop, July, Veszprem, Hungary.