田中 清喜. Biharmonic Bergman space and its reproducing kernel. Complex Variables and Elliptic Equations. 2018. 63. 11. 1642-1663
西尾昌治, 田中清喜. Harmonic Bergman kernels and Toeplitz operators on the ball with radial measures. REVUE ROUMAINE DE MATHEMATIQUES PURES ET APPLIQUEES. 2017. 62. 155-169