article

scholarly article published October 1974

scholarly article / conference paper

scholarly article by Juris Hartmanis & R. E. Stearns published May 1965 in Transactions of the American Mathematical Society

scholarly article by Juris Hartmanis & R. E. Stearns published 1965 in Transactions of the American Mathematical Society

scientific article published in July 1968

scientific article published in November 1959

scientific article published in November 1994