Skeivalas, Jonas, and Lina Barzdaitė. “Application of Covariation of Photogrammetric Aspects for Electrocardiogram Analyse”. Geodesy and Cartography 36, no. 2 (August 3, 2012): 69-72. Accessed March 29, 2024. https://journals.vilniustech.lt/index.php/GAC/article/view/10824.