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5. Alaca, A., Alaca, Ş, Williams, K.S.: Evaluation of the convolution sums $$\mathop {\displaystyle \sum }\limits _{l+24m=n} (l) (m)$$ and $$\mathop {\displaystyle \sum }\limits _{_{3l+8m=n}} (l) (m)$$. Math. J. Okayama Univ. 49, 93–111 (2007)