[1]
CHENG, S.S., XIE, S.-L. and ZHANG, B.G. 1996. QUALITATIVE THEORY OF PARTIAL DIFFERENCE EQUATIONS (V): STURMIAN THEOREMS FOR A CLASS OF PARTIAL DIFFERENCE EQUATIONS. Tamkang Journal of Mathematics. 27, 1 (Mar. 1996), 89–97. DOI:https://doi.org/10.5556/j.tkjm.27.1996.4366.