@techreport{RISC5038,
author = {Carsten Schneider},
title = {{A Difference Ring Theory for Symbolic Summation}},
language = {english},
year = {2014},
institution = {arXiv:1408.2776 [cs.SC]},
length = {49},
url = {http://arxiv.org/abs/1408.2776}
}