%0 Journal Article %A Mike C. Hay %T A Completeness Study on Certain $2\times2$ Lax Pairs Including Zero Terms %J Symmetry, integrability and geometry: methods and applications %D 2011 %V 7 %U http://geodesic.mathdoc.fr/item/SIGMA_2011_7_a88/ %G en %F SIGMA_2011_7_a88