Abdurahman, Nurhay, Idrus Alwi, Lukman Hakim, Dasnan Ismail, and Hardjanti Soelistijo. 1998. “Association of Disease Activity and Pericardial Effusion on Systemic Lupus Erythematosus Patients”. Medical Journal of Indonesia 7 (2), 89-93. https://doi.org/10.13181/mji.v7i2.782.