C. C. Chang, Anne C. Morel. On Closure Under Direct Product. Journal of Symbolic Logic, 23(2):149-154, 1958.
@article{ChangM58, title = {On Closure Under Direct Product}, author = {C. C. Chang and Anne C. Morel}, year = {1958}, tags = {C++}, researchr = {https://researchr.org/publication/ChangM58}, cites = {0}, citedby = {0}, journal = {Journal of Symbolic Logic}, volume = {23}, number = {2}, pages = {149-154}, }