| Matematika i muzika Z Šikić Hrvatsko Matematičko društvo, Zagreb, 1999 | 14 | 1999 |
| Knjiga o kalendarima Z Šikić Profil International Zagreb, 2001 | 11 | 2001 |
| Kako je stvarana novovjekovna matematika Z Šikić Školska knjiga Zagreb, 1989 | 11 | 1989 |
| Filozofija matematike Z Šikić Školska knjiga Zagreb, 1995 | 10 | 1995 |
| Matematika 6, Udžbenik i zbirka zadataka za šesti razred osnovne škole, 2.-polugodište Z Šikić, V Draženović–Žitko, M Marić, L Krnić Profil, Zagreb, 2014 | 8 | 2014 |
| Račun diferencijalni i integralni: Dio 1 L Krnić, Z Šikić Školska knjiga, 1992 | 8 | 1992 |
| Taylor's theorem Z Šikić International Journal of Mathematical Education in Science and Technology 21 …, 1990 | 6 | 1990 |
| Cantor's Theorem and Paradoxical Classes. Z Šikić Mathematical Logic Quarterly 32, 1986 | 5 | 1986 |
| The diagonal argument—a study of cases Z Šikić Taylor & Francis Group 6 (3), 191-203, 1992 | 4 | 1992 |
| Rules of thumb for positive and negative test results Z Šikić Journal of evaluation in clinical practice 27 (1), 158-159, 2021 | 3 | 2021 |
| What is Probability and Why Does it Matter? Z Šikić European Journal of Analytic Philosophy 10 (1), 21-43, 2014 | 3 | 2014 |
| Istine i laži o zlatnom rezu Z Šikić Poučak: časopis za metodiku i nastavu matematike 4 (15), 50-69, 2003 | 3 | 2003 |
| A Proof of the Characterization Theorem for Consequence Relations. Z Šikić Mathematical Logic Quarterly 37, 1991 | 3 | 1991 |
| Continuing Variations on a System of Gentzen. Z Šikić Mathematical Logic Quarterly 31, 1985 | 3 | 1985 |
| Mathematical logic: mathematics of logic or logic of mathematics Z Šikić Guide to Deep Learning Basics: Logical, Historical and Philosophical …, 2020 | 2 | 2020 |
| Matematika 6, udžbenik matematike za 6. razred osnovne škole, 2. svezak Z Šikić, V Draženović-Žitko, I Golac Jakopović, B Goleš, Z Lobor, M Marić, ... | 2 | 2019 |
| What are numbers? Z Šikić International studies in the philosophy of science 10 (2), 159-171, 1996 | 2 | 1996 |
| Premiss tree proofs and logic of contradiction. Z Šikić Mathematical Logic Quarterly 36 (3), 1990 | 2 | 1990 |
| Matematika: za šesti razred osnovne škole: priručnik za nastavnike L Krnić, Z Šikić Školska knjiga, 1986 | 2 | 1986 |
| Multiple Forms of Gentzen's Rules and Some Intermediate Logics. Z Šikić Mathematical Logic Quarterly 30, 1984 | 2 | 1984 |
