@article{1183525783, author = {Singletary, Wilson E.}, title = {A complex of problems proposed by Post}, journal = {Bull. Amer. Math. Soc.}, volume = {70}, number = {6}, year = {1964}, pages = { 105-109}, language = {en}, url = {http://dml.mathdoc.fr/item/1183525783} }
Singletary, Wilson E. A complex of problems proposed by Post. Bull. Amer. Math. Soc., Tome 70 (1964) no. 6, pp. 105-109. http://gdmltest.u-ga.fr/item/1183525783/