Kütükçüler, N., Tütüncüoğlu, S., Yilmaz, D., Akalin, T., & Kandiloğlu, G. (1998). Subcutaneous granuloma annulare and IgA-IgG2 deficiency. The Turkish Journal of Pediatrics, 40(2), 279-281. https://turkjpediatr.org/article/view/3312