Gene Freudenburg, Takanori Nagamine. Affine and unirational unique factorization domains with unmixed gradings. Kyoto Journal of Mathematics (to appear). 2026
Hideo Kojima, Takanori Nagamine, Riko Sasagawa. Remarks on retracts of polynomial rings in three variables in any characteristic. Czechoslovak Mathematical Journal. 2025. 75. 1197-1211
Neena Gupta, Takanori Nagamine. Retracts of Laurent polynomial rings. Journal of the Ramanujan Mathematical Society. 2025. 40. 4. 379-383
Daniel Daigle, Gene Freudenburg, Takanori Nagamine. Generalizations of Samuel's criteria for a ring to be a unique factorization domain. Journal of Algebra. 2022. 594. 271-306