@article{JRAM_1974__271_151516,
     author = {Richard H. Hudson},
     title = {Totally multiplicative sequences with values ... 1 which exclude four consecutive values of 1.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {218--220},
     publisher = {mathdoc},
     volume = {271},
     year = {1974},
     zbl = {0307.10002},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1974__271_151516/}
}