@Article{turing1936a, author = {Turing, Alan M.}, title = {On Computable Numbers, with an Application to the Entscheidungsproblem}, journal = {Proceedings of the London Mathematical Society}, year = {1936}, number = {42}, url = {http://www.cs.helsinki.fi/u/gionis/cc05/OnComputableNumbers.pdf}, const = {\ text} }