@article{JTNB_1991__3_1_43_0,
     author = {P. Erd\"os and J. O. Shallit},
     title = {New bounds on the length of finite pierce and {Engel} series},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {43--53},
     publisher = {Universit\'e Bordeaux I},
     volume = {3},
     number = {1},
     year = {1991},
     zbl = {0727.11003},
     mrnumber = {1116100},
     language = {en},
     url = {https://jtnb.centre-mersenne.org/item/JTNB_1991__3_1_43_0/}
}