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2. Alaca, A., Alaca, S., Williams, K.S.: Evaluation of the convolution sums $$\sum _{l+12m=n} (l) (m)$$ and $$\sum _{3l+4m=n} (l) (m)$$. Adv. Theor. Appl. Math. 1(1), 27–48 (2006)
3. Alaca, A., Alaca, S., Williams, K.S.: Evaluation of the convolution sums $$\sum _{l+18m=n} (l) (m)$$ and $$\sum _{2l+9m=n} (l) (m)$$. Int. Math. Forum 2(1–4), 45–68 (2007)
4. Alaca, A., Alaca, S., Williams, K.S.: Evaluation of the convolution sums $$\sum _{l+24m=n} (l) (m)$$ and $$\sum _{3l+8m=n} (l) (m)$$. Math. J. Okayama Univ. 49, 93–111 (2007)
5. Alaca, A., Alaca, S., Williams, K.S.: The convolution sum $$\sum _{m