K. Freivalds, P.Kikusts. Robust image topological feature extraction. Proceedings of Applied Information and Communication Technology AICT 2012. ISBN 978-9984-48-065-7, pp 82–91.

K. Boitmanis, K. Freivalds, P. Ledins, R. Opmanis. Fast and Simple Approximation of the Diameter and Radius of a Graph. Proc of Experimental Algorithms WEA 2006, Lecture Notes in Computer Science, vol. 4007, pp. 98–108. Springer-Verlag 2006.

K.Freivalds Nondifferentiable optimization based algorithm for graph ratio-cut partitioning, Scientific Papers University of Latvia, vol. 669, pp. 61–79. University of Latvia, 2004.

K. Freivalds, A Nondifferentiable Optimization Approach to Ratio-Cut Partitioning, Workshop on Experimental and Efficient Algorithms (WEA 2003), Lecture Notes in Computer Science vol. 2647,  pp. 134–147. Springer-Verlag, 2003.

J. Rung, T. Schlitt, A. Brazma, K. Freivalds, J. Vilo Building and analysing genome-wide gene disruption networks. Bioinformatics 2002 Oct;18 Suppl 2:S202-210. European Conference on Computational Biology (ECCB 2002)

K. Freivalds, U. Dogrusoz, and P. Kikusts, Disconnected Graph Layout and the Polyomino Packing Approach, Proc. of Graph Drawing 2001, Lecture Notes in Computer Science, vol. 2265, pp. 378-391, Springer-Verlag, 2002.

K. Freivalds, Curved Edge Routing, Proc. of the Symposium on Fundamentals of Computation Theory 2001, LNCS vol. 2138, pp. 126–137.

K. Freivalds, P. Kikusts  Optimum Layout Adjustment Supporting Ordering Constraints in Graph-Like Diagram Drawing. Proc. of the Latvian Academy of Sciences, Section B, Vol. 55 (2001), No. 1, pp. 43–51.