Knopp, Konrad (1951). Theory and application of infinite series. Translated by Young, R. C. H. Translated from the 2nd edition and revised in accordance with the fourth by R. C. H. Young. (2 ed.). London–Glasgow: Blackie & Son. Zbl0042.29203.
Knopp, Konrad (1951). Theory and application of infinite series. Translated by Young, R. C. H. Translated from the 2nd edition and revised in accordance with the fourth by R. C. H. Young. (2 ed.). London–Glasgow: Blackie & Son. Zbl0042.29203.