NCSOStools: a computer algebra system for symbolic and numerical computation with noncommutative polynomials. - Kristijan Cafuta; Igor Klep; Janez Povh (Optim. Methods Softw., 2011)

Constrained Polynomial Optimization Problems with Noncommuting Variables. - Kristijan Cafuta; Igor Klep; Janez Povh (SIAM J. Optim., 2012)

Algorithmic aspects of sums of Hermitian squares of noncommutative polynomials. - Sabine Burgdorf; Kristijan Cafuta; Igor Klep; Janez Povh (Comput. Optim. Appl., 2013)

The tracial moment problem and trace-optimization of polynomials. - Sabine Burgdorf; Kristijan Cafuta; Igor Klep; Janez Povh (Math. Program., 2013)

Rational sums of hermitian squares of free noncommutative polynomials. - Kristijan Cafuta; Igor Klep; Janez Povh (Ars Math. Contemp., 2015)

Sums of Hermitian squares decomposition of non-commutative polynomials in non-symmetric variables using NCSOStools. - Kristijan Cafuta (Central Eur. J. Oper. Res., 2019)