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 | 2 | 2019 |

The harmonic evolute of a helicoidal surfaces in Minkowski 3-space I Protrka Young Researcher Workshop on Differential Geometry in Minkowski Space, 2017 | 2 | 2017 |

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

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 |

Harmonic evolutes of B-scrolls with constant mean curvature in Minkowski space I Protrka, Ž Milin-Šipuš, LP Gajčić 4th Croatian Conference on Geometry and Graphics, 2018 | | 2018 |

An Invitation to Combinatorial Tropical Geometry I Protrka | | 2017 |

New examples of maximal surfaces in Minkowski space I Protrka, Ž Milin-Šipuš, LP Gajčić 20th scientific-professional colloquium on Geometry and Graphics, 2017 | | 2017 |

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 | | |