Denis, M., & Yee, W. (2019). A simplified proof of the reduction point crossing sign formula for Verma modules. Algebra and Discrete Mathematics.
Chicago Style (17th ed.) CitationDenis, M.St, and W.L Yee. "A Simplified Proof of the Reduction Point Crossing Sign Formula for Verma Modules." Algebra and Discrete Mathematics 2019.
MLA (8th ed.) CitationDenis, M.St, and W.L Yee. "A Simplified Proof of the Reduction Point Crossing Sign Formula for Verma Modules." Algebra and Discrete Mathematics, 2019.
Warning: These citations may not always be 100% accurate.