@article{RSMUP_1954__23__340_0,
     author = {Trevisan, Giorgio},
     title = {Su l{\textquoteright}equazione differenziale $y^{\prime \prime }(x) + A(x)y(x ) = 0$},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {340--342},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {23},
     year = {1954},
     mrnumber = {66518},
     zbl = {0056.31005},
     language = {it},
     url = {http://www.numdam.org/item/RSMUP_1954__23__340_0/}
}