Muliar, V., and S. Yatsiuk. “Data Visualization in Google Sheets Using the SPARKLINE Function.”. COMPUTER-INTEGRATED TECHNOLOGIES: EDUCATION, SCIENCE, PRODUCTION, no. 42 (April 1, 2021): 191-197. Accessed July 5, 2022. http://cit-journal.com.ua/index.php/cit/article/view/243.