Albab, Ulul, Abdul Hakim, Muhammad Muzakki, and Intan Rahmawati. “Social Identity and Altruism During Crisis Situations: Social Groups Solidarity”. Journal of Social Entrepreneurship Theory and Practice 4, no. 2 (December 31, 2025): 66–80. Accessed January 9, 2026. https://journals.researchsynergypress.com/index.php/jsetp/article/view/3708.