Ingham Tauberian theorem with an estimate for the error term. Balanzario, E. P., Marmolejo-Olea, E. (2003) International Journal of Mathematics and Mathematical Sciences
Integral transformations and closed form expressions for sums of double infinite series N. C. Jain (1971) Annales Polonici Mathematici
Inverspositive Operatoren und Taubersätze in der Erneuerungstheorie. Harro Walk (1975) Monatshefte für Mathematik