1. Adámek, J., Herrlich, H., Strecker, G.E., 1990. Abstract and Concrete Categories. Wiley.
2. Eklund, P., Galán, M.A., Helgesson, R., Kortelainen, J., 2014a. From Aristotle to Lotfi, in: Seising, R., Trillas, E., Moraga, C., Termini, S. (Eds.), On Fuzziness. Springer. volume 298 of Studies in Fuzziness and Soft Computing. chapter From Aristotle to Lotfi, pp. 147–152.
3. Fuzzy terms;Eklund;Fuzzy Sets and Systems,2014
4. Eklund, P., Höhle, U., Kortelainen, J., 2014c. The fundamentals of lative logic, in: Abstracts in Linz 2014, 35th Linz Seminar on Fuzzy Set Theory, Linz, Austria.
5. A survey on the categorical term construction with applications;Eklund;Fuzzy Sets and Systems,2016