Norbert Ortner and Peter Wagner: Green functions and Poisson kernels for iterated operators.
Dirichlet and Cauchy--Dirichlet problems in half- and quarter spaces (PAFA)
Volume 7, Number 2, 781-804, 2022
Green functions and Poisson kernels for iterated operators. Dirichlet and
Cauchy-Dirichlet problems in half- and quarter spaces
Norbert Ortner and Peter Wagner