Modelling Online Course Services and Comparison of its Major Providers. - Abdullah Alkaff; Mochamad Nur Qomarudin; Sylmina Dalily Alkaff; Yusuf Bilfaqih (Int. J. Emerg. Technol. Learn., 2018)

Matrix-analytic solutions in production lines without buffers. - Abdullah Alkaff; Mochamad Nur Qomarudin; Stefanus Eko Wiratno (Comput. Oper. Res., 2020)

Dynamic reliability modeling for general standby systems. - Abdullah Alkaff; Mochamad Nur Qomarudin; Elly Purwantini; Stefanus Eko Wiratno (Comput. Ind. Eng., 2021)

Network reliability analysis: matrix-exponential approach. - Abdullah Alkaff; Mochamad Nur Qomarudin; Yusuf Bilfaqih (Reliab. Eng. Syst. Saf., 2021)

Time-dependent reliability computation of system with multistate components. - Yusuf Bilfaqih; Mochamad Nur Qomarudin; Mochammad Sahal (Appl. Math. Comput., 2025)