Masaki Tajiri, Tomio Umeda. Representation formulas of the solutions to the Cauchy problems for first order systems. OSAKA JOURNAL OF MATHEMATICS. 2007. 44. 1. 197-205
M NAGASE, T UMEDA. THE NONRELATIVISTIC LIMIT FOR THE WEYL QUANTIZED HAMILTONIANS AND PSEUDODIFFERENTIAL-OPERATORS. FORUM MATHEMATICUM. 1992. 4. 4. 377-381
M NAGASE, T UMEDA. ON THE ESSENTIAL SELF-ADJOINTNESS OF PSEUDODIFFERENTIAL-OPERATORS. PROCEEDINGS OF THE JAPAN ACADEMY SERIES A-MATHEMATICAL SCIENCES. 1988. 64. 4. 94-97
T UMEDA. RADIATION CONDITIONS AND RESOLVENT ESTIMATES FOR RELATIVISTIC SCHRODINGER-OPERATORS. ANNALES DE L INSTITUT HENRI POINCARE-PHYSIQUE THEORIQUE. 1995. 63. 3. 277-296
Resolvent estimates of the Dirac operator(共著). Analysis. 1995. 15. 123