-652234. (n.d). Wood texture template. https://pixabay.com/photos/wood-texture-template-structure-4754713/
-Big-O Algorithm Complexity Cheat Sheet (Know Thy Complexities!) @ericdrowell. (n.d.). https://www.bigocheatsheet.com/
-Chinh. (n.d.) Seamless nice beautiful wood texture and background. https://as2.ftcdn.net/v2/jpg/03/72/44/25/1000_F_372442505_bQqEQm29uHjkLo2XE12L0Fm7vvejyxcQ.jpg
-Damkier, Mikael. (n.d.) Nebula in outer space, planets and galaxy. https://as2.ftcdn.net/v2/jpg/05/02/11/91/1000_F_502119125_9F1aqUL3OIEghKale1OqApJbiesrS74q.jpg
-Grewe, Michelle. (September 18, 2015). Purple Glitter 5. https://www.flickr.com/photos/gabbysol/21494467656/in/photostream/
-Johnstocker. (n.d.). Blackboard inscribed with scientific formulas. https://as2.ftcdn.net/v2/jpg/02/96/69/35/1000_F_296693591_LLV71rMMvRshdRxNr01fxn8GGrvM9teK.jpg
-Semar Design. (n.d). Modern white certificate template and border. https://as2.ftcdn.net/v2/jpg/04/99/85/77/1000_F_499857739_t3L0k2sVkvg5r3UuSbD23aDb5fjoHVqU.jpg
-Synelnychenko, Dmytro. (n.d.) Elegant violet, purple glitter, sparkle confetti texture. Christmas abstract background, seamless pattern. https://as2.ftcdn.net/v2/jpg/03/01/76/21/1000_F_301762187_wWx4bEIFLL89QrhlvyoWcYwwdNiOpFyb.jpg
-TastyVoxels. (n.d). Violet space 360 VR background cube map. https://as2.ftcdn.net/v2/jpg/05/06/72/53/1000_F_506725363_sdw1qaksOXdVM1PApw4J6lwyKjjdSBtJ.jpg
-Unknown. (n.d.) Protractor Vector Accurate, HD png Download https://www.pngitem.com/middle/TJTxmoT_protractor-vector-accurate-hd-png-download/
-Unknown. (n.d.). Computer Icons Protractor. https://www.pngegg.com/en/png-winpm
-Ustas. (n.d.) Mars, HDRI, environment map , Round panorama, spherical panorama, equidistant projection, 360 high resolution panorama, 3d rendering. https://as1.ftcdn.net/v2/jpg/03/67/12/06/1000_F_367120667_1d8NHhnyAWHvtY4RNGUQkadAW0rI6AEy.jpg
-Илья Подопригоров. (n.d.) Seamless dark brown wooden board texture. https://as1.ftcdn.net/v2/jpg/03/21/84/64/1000_F_321846439_SVPz9h0oyDjZ4v2I1XzStQYaD3J8Jy2c.jpg
