[1] Adámek J., Gumm H. P., Trnková V.: 
Presentation of set functors: a coalgebraic perspective. J. Logic Comput. 20 (2010), no. 5, 991–1015. 
DOI 10.1093/logcom/exn090 | 
MR 2725166[2] Adámek J., Porst H. E.: From varieties of algebras to covarieties of coalgebras. Coalgebraic Methods in Computer Science (a Satellite Event of ETAPS 2001), Electronic Notes in Theoretical Computer Science 44 (2001), no. 1, 27–46.
[5] Barto L., Bulín J., Krokhin A., Opršal J.: 
Algebraic approach to promise constraint satisfaction. available at arXiv:1811.00970v3 [cs.CC] (2019), 73 pages. 
MR 4003368[6] Barto L., Krokhin A., Willard R.: 
Polymorphisms, and how to use them. The Constraint Satisfaction Problem: Complexity and Approximability, Dagstuhl Follow-Ups, 7, Schloss Dagstuhl. Leibniz-Zent. Inform., Wadern, 2017, pages 1–44. 
MR 3631047[8] Barto L., Zima P.: 
Every group is representable by all natural transformations of some set-functor. Theory Appl. Categ. 14 (2005), no. 13, 294–309. 
MR 2182678[9] Bulatov A. A.: 
A dichotomy theorem for nonuniform CSPs. 58th Annual IEEE Symposium on Foundations of Computer Science---FOCS 2017, IEEE Computer Soc., Los Alamitos, 2017, pages 319–330. 
MR 3734240[11] García O. C., Taylor W.: 
The lattice of interpretability types of varieties. Mem. Amer. Math. Soc. 50 (1984), no. 305, 125 pages. 
MR 0749524[14] Koubek V.: 
Set functors. Comment. Math. Univ. Carolin. 12 (1971), 175–195. 
MR 0286860[16] Pultr A., Trnková V.: 
Combinatorial, Algebraic and Topological Representations of Groups, Semigroups and Categories. North-Holland Mathematical Library, 22, North-Holland Publishing, Amsterdam, 1980. 
MR 0563525[18] Trnková V.: 
Universal categories. Comment. Math. Univ. Carolinae 7 (1966), 143–206. 
MR 0202808[19] Trnková V.: 
Some properties of set functors. Comment. Math. Univ. Carolinae 10 (1969), 323–352. 
MR 0252474[20] Trnková V.: 
On descriptive classification of set-functors. I. Comment. Math. Univ. Carolinae 12 (1971), 143–174. 
MR 0294445[21] Trnková V.: 
On descriptive classification of set-functors. II. Comment. Math. Univ. Carolinae 12 (1971), 345–357. 
MR 0294446[22] Trnková V.: 
Universal concrete categories and functors. Cahiers Topologie Géom. Différentielle Catég. 34 (1993), no. 3, 239–256. 
MR 1239471[23] Trnková V.: 
Amazingly extensive use of Cook continuum. Math. Japon. 51 (2000), no. 3, 499–549. 
MR 1757312[26] Zhuk D.: 
A proof of CSP dichotomy conjecture. 2017 58th Annual IEEE Symposium on Foundations of Computer Science---FOCS 2017, IEEE Computer Soc., Los Alamitos, 2017, pages 331–342. 
MR 3734241