Ikhsan Maulidi, and Vina Apriliani. “Model Kredibilitas Bühlmann Dengan Frekuensi Klaim Berdistribusi Binomial Negatif-Lindley”. Limits: Journal of Mathematics and Its Applications, vol. 18, no. 1, May 2021, pp. 71-78, https://journal.its.ac.id/index.php/limits/article/view/5381.