@incollection {shemyakova:mult_facts1:2009,
   author = {Shemyakova, Ekaterina},
   affiliation = {J. Kepler University Research Institute for Symbolic Computation (RISC) Altenbergerstr. 69 A-4040 Linz Austria},
   title = {Multiple Factorizations of Bivariate Linear Partial Differential Operators},
   booktitle = {Computer Algebra in Scientific Computing},
   series = {Lecture Notes in Computer Science},
   editor = {Gerdt, Vladimir and Mayr, Ernst and Vorozhtsov, Evgenii},
   publisher = {Springer Berlin / Heidelberg},
   isbn = {},
   pages = {299-309},
   volume = {5743},
   url = {http://dx.doi.org/10.1007/978-3-642-04103-7_26},
   note = {10.1007/978-3-642-04103-7_26},
   year = {2009}
}