Функции за търсене и препратки

 https://docs.google.com/presentation/d/1YvfISi3SltjRkuIZBT7RSLWByMasAUjJ/edit?slide=id.p1#slide=id.p1

https://docs.google.com/presentation/d/1Xuz9Sp1IUmPiaY7Pt3ThFHiNWPPX8ji9/edit?slide=id.p1#slide=id.p1

https://drive.google.com/drive/folders/1ZZJt-FA0O1oQyPU0TvxEy-sBx4SPNnbZ