Harmonic evolutes of -scrolls with constant mean curvature in Lorentz–Minkowski space R López, ŽM Šipuš, LP Gajčić, I Protrka International Journal of Geometric Methods in Modern Physics 16 (05), 1950076, 2019 | 3 | 2019 |

The harmonic evolute of a helicoidal surfaces in Minkowski 3-space I Protrka Differential Geometry in Lorentz-Minkowski space, Proceedings of the Young …, 2017 | 3 | 2017 |

Null scrolls as *B*-scrolls in Lorentz-Minkowski 3-spaceZM Sipus, LP GAJCIC, I Protrka Turkish Journal of Mathematics 43 (6), 2908-2920, 2019 | 2 | 2019 |

Harmonic Evolutes of Timelike Ruled Surfaces in Minkowski Space I Protrka, Ž Milin Šipuš Abstracts of 18th scientific-professional colloquium on Geometry and …, 2015 | 1 | 2015 |

Null scrolls with spacelike harmonic evolutes in Lorentz-Minkowski space R López, ŽM Šipuš, LP Gajčić, I Protrka Results in Mathematics 76 (1), 1-21, 2021 | | 2021 |

Involutes of Pseudo-Null Curves in Lorentz–Minkowski 3-Space R López, Ž Milin Šipuš, L Primorac Gajčić, I Protrka Mathematics 9 (11), 1256, 2021 | | 2021 |

Generalized Helices on a Lightlike Cone in 3-Dimensional Lorentz-Minkowski Space Ž Milin Šipuš, I Protrka, L Primorac Gajčić KoG 24 (24.), 41-46, 2020 | | 2020 |

Opće zavojnice na svjetlosnom stošcu u trodimenzionalnom Lorentz-Minkowskijevom prostoru Ž Milin Šipuš, I Protrka, L Primorac Gajčić KoG 24 (24.), 41-46, 2020 | | 2020 |

Null scrolls with prescribed curvatures in Lorentz-Minkowski 3-space ŽM Šipuš, LP Gajčić, I Protrka Analele Universitatii" Ovidius" Constanta-Seria Matematica 28 (3), 229-240, 2020 | | 2020 |

Plohe konstantne srednje zakrivljenosti i njima pridružene fokalne krivulje i plohe u Minkowskijevom prostoru I Protrka University of Zagreb. Faculty of Science. Department of Mathematics, 2019 | | 2019 |

Structure Functions of Ruled Surfaces with Null Rulings LP Gajčić, I Protrka, ŽM Šipuš International Conference on Geometry and Graphics, 371-380, 2018 | | 2018 |

Structure functions of ruled surfaces with null rulings LP Gajcic, I Protrka, ZM Šipuš | | |

Structure Functions of Ruled Surfaces with Null Rulings L Primorac Gajčić, Ž Milin Šipuš, I Protrka Proceedings of the 18th International Conference on Geometry and Graphics …, 0 | | |

Harmonic evolutes of B-scrolls with constant mean curvature in Minkowski space I Protrka, Ž Milin-Šipuš, L Primorac Gajčić Abstracts of 4th Croatian Conference on Geometry and Graphics, 34, 0 | | |

An Invitation to Combinatorial Tropical Geometry I Protrka Proceedings of the 1st Croatian Combinatorial Days/Došlić, Tomislav …, 0 | | |

New examples of maximal surfaces in Minkowski space I Protrka, Ž Milin-Šipuš, L Primorac Gajčić Abstracts of 20th scientific-professional colloquium on Geometry and …, 0 | | |