- SIGMOD Record 22(4):19-25 (1993)
- AMCIS, page 64. Association for Information Systems, (2009)
- ICIS, page 34. Association for Information Systems, (2002)
- Adv. Software Engineering (2011)
- Operating Systems Review 15(1):14-25 (1981)
- SAICSIT Conf., page 1-10. ACM, (2011)
- ECIS, page 1252-1265. Euro-Arab Management School, (1998)
- ECIS, page 483-497. Euro-Arab Management School, (1998)
- Encyclopedia of Information Science and Technology I, Idea Group, (2005)
- ISCNZ, page 164-175. IEEE Computer Society, (1996)
- J. AIS (2011)
- Applications of sheaves Proc. Res. Sympos. Appl. Sheaf Theory to Logic, Algebra and Anal., Univ. Durham, Durham, 1977, volume 753 of Lecture Notes in Math., Springer, Berlin, (1979)
- Theory Appl. Categ. (1999)
- Cent. Eur. J. Math. 4(1):64--81 electronic (2006)
- London Mathematical Society Lecture Note Series Cambridge University Press, Cambridge, Second edition, (2006)
- (2007)
- Cambridge Tracts in Mathematics Cambridge University Press, Cambridge, (2010)
- EISIC, page 123-128. IEEE, (2011)
- EISIC, page 360-365. IEEE, (2011)
- EISIC, page 197-202. IEEE, (2011)


author