Zgair, Ayaid K. “Plaque Forming Cell Technique for Counting IgG and IgM Antibody-Secreting Cells in Peripheral Blood of Patients With Rheumatoid Arthritis”. World Journal of Experimental Biosciences (ISSN: 2313-3937) 1, no. 2 (December 5, 2013): 37–42. Accessed April 6, 2025. https://wjebio.com/index.php/journal/article/view/29.