@misc{proper1999research,
   author = {Proper, Henderik A.},
   month = {September},
   title = {Research for Innovation},
   url = {http://www.niii.kun.nl/is/Docs/Presentation:99:Proper:IDAnniversary.pdf},
   urldate = {1999-12-20},
   year = {1999},
}