Adjan, S. I. (1967). Defining Relations and Algorithmic Problems for Groups and Semigroups. Providence, Rhode Island: American Mathematical Society.
शिकागो स्टाइल उद्धरणAdjan, S. I. Defining Relations and Algorithmic Problems for Groups and Semigroups. Providence, Rhode Island: American Mathematical Society, 1967.
एमएलए उद्धरणAdjan, S. I. Defining Relations and Algorithmic Problems for Groups and Semigroups. Providence, Rhode Island: American Mathematical Society, 1967.
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