1. Alaca, A., Alaca, Ş., Williams, K.S.: Evaluation of the convolution sums
$$\sum _{l+12m=n} \sigma (l) \sigma (m) $$
∑
l
+
12
m
=
n
σ
(
l
)
σ
(
m
)
and
$$\sum _{3l+4m=n} \sigma (l) \sigma (m) $$
∑
3
l
+
4
m
=
n
σ
(
l
)
σ
(
m
)
. Adv. Theor. Appl. Math. 1, 27–48 (2006)
2. Alaca, A., Alaca, Ş., Williams, K.S.: Evaluation of the convolution sums
$$\sum _{l+18m=n} \sigma (l) \sigma (m) $$
∑
l
+
18
m
=
n
σ
(
l
)
σ
(
m
)
and
$$\sum _{2l+9m=n} \sigma (l) \sigma (m) $$
∑
2
l
+
9
m
=
n
σ
(
l
)
σ
(
m
)
. Int. Math. Forum 2, 45–68 (2007)
3. Alaca, A., Alaca, Ş., Williams, K.S.: Evaluation of the convolution sums
$$\sum _{l+24m=n} \sigma (l) \sigma (m) $$
∑
l
+
24
m
=
n
σ
(
l
)
σ
(
m
)
and
$$\sum _{3l+8m=n} \sigma (l) \sigma (m) $$
∑
3
l
+
8
m
=
n
σ
(
l
)
σ
(
m
)
. Math. J. Okayama Univ. 49, 93–111 (2007)
4. Alaca, A., Alaca, Ş., Williams, K.S.: The convolution sum
$$\sum _{m{<}n/16} \sigma (m)\sigma (n - 16m)$$
∑
m
<
n
/
16
σ
(
m
)
σ
(
n
-
16
m
)
. Can. Math. Bull. 51, 3–14 (2008)
5. Alaca, Ş., Kesicioğlu, Y.: Evaluation of the convolution sums
$$\sum _{l+27m=n} \sigma (l) \sigma (m) $$
∑
l
+
27
m
=
n
σ
(
l
)
σ
(
m
)
and
$$\sum _{l+32m=n} \sigma (l) \sigma (m) $$
∑
l
+
32
m
=
n
σ
(
l
)
σ
(
m
)
. J. Number Theory 1, 1–13 (2016)