author = {Erik Hillgarter},
title = {{A Contribution to the Symmetry Classification Problem for 2nd Order PDEs in one Dependent and two Independent Variables}},
number = {02-26},
year = {2002},
month = {December},
note = {PhD Thesis},
keywords = {partial differential equations},
sponsor = {SFB project F1304, RISC PhD scholarship program of the government of Upper Austria},
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)}