%0 Journal Article %A Lorch, Lee %A Muldoon, Martin E. %A Szego, Peter %T Higher Monotonicity Properties of Certain Sturm-Liouville Functions. IV %J Canadian journal of mathematics %D 1972 %P 349-368 %V 24 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-029-9/ %R 10.4153/CJM-1972-029-9 %F 10_4153_CJM_1972_029_9