@article{10_1017_S0017089521000203,
     author = {PUSHPA, K. and VASUKI, K. R.},
     title = {EVALUATION {OF} {CONVOLUTION} {SUMS} $$\sum\limits_{l + km = n} {\sigma (l)\sigma (m)} $$ {AND} $$\sum\limits_{al + bm = n} {\sigma (l)\sigma (m)} $$ {FOR} k = a {\textperiodcentered} b = 21, 33, {AND} 35},
     journal = {Glasgow mathematical journal},
     pages = {434--453},
     year = {2022},
     volume = {64},
     number = {2},
     doi = {10.1017/S0017089521000203},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089521000203/}
}