@incollection{gatteschi:1990:new,
    author = {Gatteschi, Luigi},
     title = {New inequalities for the zeros of confluent hypergeometric functions},
 booktitle = {Asymptotic and computational analysis (Winnipeg, MB, 1989)},
     pages = {175–192},
 publisher = {Dekker},
   address = {New York},
      year = {1990},
   mrclass = {33C15},
  mrnumber = {MR1052433 (92b:33010)},
     zblno = {0701.33006}}