Markova KT, Dovramadjiev TA, Jecheva GV. Methodology for creating 3D paper unfolded models with complex geometry using open-source software and resources with free personal and commercial license. AJTUV [Internet]. 2018 Jun. 30 [cited 2025 Oct. 2];2(1):39-46. Available from: https://aj.tu-varna.bg/index.php/ajtuv/article/view/67