Frisch, Mathias (2010) Principle or Constructive Relativity? In: [2009] EPSA09: 2nd Conference of the European Philosophy of Science Association (Amsterdam, 21-24 October, 2009) > EPSA 2009 Contributed Papers <http://philsci-archive.pitt.edu/view/confandvol/EPSA2009ContribPapers.html>.