On the Algebraic Structure of Primitive Recursive Functions. - István Szalkai (Math. Log. Q., 1985)

Counting Simplexes in R3. - Claude Laflamme; István Szalkai (Electron. J. Comb., 1998)

Finding better weight functions for generalized Shepard's operator on infinite intervals. - Biancamaria Della Vecchia; István Szalkai (Int. J. Comput. Math., 2011)

Reakciómechanizmusok algoritmikus és matematikai vizsgálata - István Szalkai (2014)

Online Algorithms for a Generalized Parallel Machine Scheduling Problem. - István Szalkai; György Dósa (MACRo, 2015)

Minimum number of affine simplices of given dimension. - István Szalkai; Zsolt Tuza (Discret. Appl. Math., 2015)

On contact numbers of totally separable unit sphere packings. - Károly Bezdek; Balázs Szalkai; István Szalkai (Discret. Math., 2016)

Multimode resource-constrained project scheduling in flexible projects. - Zsolt Tibor Kosztyán; István Szalkai (J. Glob. Optim., 2020)

Impacts of synergies on software project scheduling. - Zsolt Tibor Kosztyán; Eszter Bogdány; István Szalkai; Marcell T. Kurbucz (Ann. Oper. Res., 2022)

A matrix-based flexible project-planning library and indicators. - Zsolt Tibor Kosztyán; Gergely Novák; Róbert Jakab; István Szalkai; Csaba Hegedüs (Expert Syst. Appl., 2023)

The effect of autonomous team role selection in flexible projects. - Zsolt Tibor Kosztyán; Péter Harta; István Szalkai (Comput. Ind. Eng., 2024)

Covering a square with consecutive squares. - János Balogh; György Dósa; Lars Magnus Hvattum; Tomas Olaj; István Szalkai; Zsolt Tuza (Ann. Oper. Res., 2025)