@article{lorch:1972:hmp,
    author = {Lorch, Lee and Muldoon, Martin E. and Szego, Peter},
     title = {Higher monotonicity properties of certain {S}turm-{L}iouville
              functions. {IV}},
   journal = {Canad. J. Math.},
  fjournal = {Canadian Journal of Mathematics. Journal Canadien de
              Math\'ematiques},
    volume = {24},
      year = {1972},
     pages = {349–368},
      issn = {0008-414X},
   mrclass = {34C99},
  mrnumber = {MR0298113 (45 \#7165)},
mrreviewer = {G. Sansone},
     zblno = {0242.34030}}