@techreport{RISC1855,author = {Olga Caprotti},
title = {{A Formal Characterization of Indexed Mathematical Objects for the Manipulation of Sums and Series}},
number = {91-26},
year = {1991},
note = {Published in Technical Report Also: Report of Dip. di Informatica e Sistemistica, Univ.\ Roma},
sponsor = { ``Progetto Finalizzato Sistemi Informatici e Calcolo Parallelo'' of CNR},
type = {RISC Report Series},
institution = {Research Institute for Symbolic Computation (RISC), Johannes Kepler University Linz},
address = {Altenberger Straße 69, 4040 Linz, Austria},
issn = {2791-4267 (online)}
}