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2. Baker LR (2006) On the twofold nature of artefacts: a response to Wybo Houkes and Anthonie Meijers. Stud Hist Philos Sci 37:132–136
3. Baker LR (2008) The shrinking difference between artifacts and natural objects. Am Philos Assoc Newsl Philos Comput 07(2):2 http://people.umass.edu/lrb/files/bak08shrM.pdf
4. Baker LR (2010) Shrinking difference – response to replies. Am Philos Assoc Newsl Philos Comput 09(2):3–38 http://people.umass.edu/lrb/files/bak10shr.pdf
5. Burazin L (2015) Practical concepts of law as an artifact kind. Pravni vjesnik 31(3–4):65–75