Ekaterina Shemyakova,
"Parametric Factorizations of Second-, Third- and Fourth-Order Linear Partial Differential Operators with a Completely Factorable Symbol on the Plane"
, in Mathematics in Computer Science, Vol. 1, Nummer 2, Seite(n) 225-237, 2007, ISSN: 1661-8289
Original Titel:
Parametric Factorizations of Second-, Third- and Fourth-Order Linear Partial Differential Operators with a Completely Factorable Symbol on the Plane