Kestabilan solusi dari sistem persamaan differensial linier order pertama
Universitas Indonesia, 1989
 UI - Skripsi (Membership)
Spiegel, Murray R.
Schaums outline of theory and problems of calculus of finite differences and differences equations
McGraw-Hill, 1971
 Buku Teks
Spiegel, Murray R.
Schaum?s outline of theory and problems of calculus of finite differences and difference equations
McGraw-Hil International, 1981
 Buku Teks
Kelley, Walter G.
Difference equations : an introduction with applications /​ Walter G. Kelley, Allan C. Peterson.
Academic Press, 1991.
 Buku Teks
Susi Indrati
Transformasi Z untuk Mencari Solusi Persamaan Difference
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1988
 UI - Skripsi (Membership)