Comparing Writing Speed and Quantity with Sign Pens and Ballpoint Pens: An Experimental Analysis. Am. J. Hum. Psychol. [Internet]. 2025 Jan. 31 [cited 2026 Jun. 15];3(1):14-9. Available from: https://www.e-pallipublishers.com/index.php/ajhp/article/view/4190