Algebraische Kennzeichnung freier Wortarithmetiken
Compositio Mathematica, Volume 15 (1962-1964), p. 156-168
@article{CM_1962-1964__15__156_0,
     author = {Van Rootselaar, B.},
     title = {Algebraische Kennzeichnung freier Wortarithmetiken},
     journal = {Compositio Mathematica},
     publisher = {Kraus Reprint},
     volume = {15},
     year = {1962-1964},
     pages = {156-168},
     zbl = {0117.01402},
     mrnumber = {168459},
     language = {de},
     url = {http://www.numdam.org/item/CM_1962-1964__15__156_0}
}
Van Rootselaar, B. Algebraische Kennzeichnung freier Wortarithmetiken. Compositio Mathematica, Volume 15 (1962-1964) pp. 156-168. http://www.numdam.org/item/CM_1962-1964__15__156_0/

B. Van Rootselaar, [1] Die Struktur der rekursiven Wortarithmetik des Herrn V. Vučković. Indagationes Math. 24, 192-200 (1962). | MR 146071 | Zbl 0199.02603

V. Vučković, [2] Rekursive Wortarithmetik. Acad. Serbe Sci., Publ. Inst. Math. 14, 9-60 (1960). | MR 125790 | Zbl 0096.24401