APA (7th ed.) Citation

Umar, A. (2010). Some combinatorial problems in the theory of symmetric inverse semigroups. Algebra and Discrete Mathematics.

Chicago Style (17th ed.) Citation

Umar, A. "Some Combinatorial Problems in the Theory of Symmetric Inverse Semigroups." Algebra and Discrete Mathematics 2010.

MLA (8th ed.) Citation

Umar, A. "Some Combinatorial Problems in the Theory of Symmetric Inverse Semigroups." Algebra and Discrete Mathematics, 2010.

Warning: These citations may not always be 100% accurate.