@article{CM_1974__28_2_159_0,
     author = {Tijdeman, R.},
     title = {On the maximal distance between integers composed of small primes},
     journal = {Compositio Mathematica},
     pages = {159--162},
     publisher = {Noordhoff International Publishing},
     volume = {28},
     number = {2},
     year = {1974},
     mrnumber = {345917},
     zbl = {0283.10024},
     language = {en},
     url = {http://www.numdam.org/item/CM_1974__28_2_159_0/}
}