author = {C. Schneider},
title = {{Symbolic Summation in ${Pi}{Sigma}$-Fields}},
language = {english},
year = {2003},
month = {28. July},
note = {Invited talk at ACA 2003, Raleigh, North Carolina},
conferencename = {ACA 2003, Raleigh, North Carolina},
url = {https://math.unm.edu/~aca/ACA/2003/2003.html}