@misc{RISC180,
author = {C. Schneider},
title = {{Symbolic Summation with Single-Nested Sum Extensions}},
language = {english},
year = {2004},
month = {6. July},
note = {Contributed talk at ISSAC'04, Santander, Spain},
conferencename = {ISSAC'04, Santander, Spain},
url = {https://www3.risc.jku.at/conferences/issac2004/}
}