@article{lorch:1970:hmp,
    author = {Lorch, Lee and Muldoon, M. E. and Szego, Peter},
     title = {Higher monotonicity properties of certain {S}turm-{L}iouville
              functions. {III}},
   journal = {Canad. J. Math.},
  fjournal = {Canadian Journal of Mathematics. Journal Canadien de
              Math\'ematiques},
    volume = {22},
      year = {1970},
     pages = {1238–1265},
      issn = {0008-414X},
   mrclass = {34.30},
  mrnumber = {MR0274845 (43 \#603)},
mrreviewer = {G. Sansone},
     zblno = {0212.40703}}