@article{GDZPPN002290944, title = {Functional Completeness in the Small. II. Algebraic Cluster Theorem.}, journal = {Mathematische Annalen}, volume = {146}, year = {1962}, pages = {173-191}, zbl = {0105.01402}, url = {http://dml.mathdoc.fr/item/GDZPPN002290944} }
FOSTER, A.L. Functional Completeness in the Small. II. Algebraic Cluster Theorem.. Mathematische Annalen, Tome 146 (1962) pp. 173-191. http://gdmltest.u-ga.fr/item/GDZPPN002290944/