author = {Erik Hillgarter},
title = {{The Classification Problem for (Point) Symmetries of 2nd Order PDE's in one Dependent and two Independent Variables}},
number = {99-11},
year = {1999},
month = {April},
note = {SFB Report},
sponsor = {FWF project F013, SFB F013},
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)}