@article{AFST_1986-1987_5_8_2_109_0,
     author = {Mureddu, Marina},
     title = {A lower bound for $P(x^4 +1)$},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {109--119},
     publisher = {Universit\'e Paul Sabatier},
     address = {Toulouse},
     volume = {Ser. 5, 8},
     number = {2},
     year = {1986-1987},
     mrnumber = {928839},
     zbl = {0633.10017},
     language = {en},
     url = {http://www.numdam.org/item/AFST_1986-1987_5_8_2_109_0/}
}