Bertolo, Nativi Viana Pereira [UNESP]2022-05-022022-05-021989-01-01Pacific Journal of Mathematics, v. 138, n. 2, p. 347-356, 1989.0030-8730http://hdl.handle.net/11449/234416We show that the Hardy space Hanal1(R+2 × R+2) can be identified with the class of functions f such that f and all its double and partial Hubert transforms Hkf belong to L1(R2). A basic tool used in the proof is the bisubharmonicity of |F|q, where F is a vector field that satisfies a generalized conjugate system of Cauchy-Riemann type. © 1989 by Pacific Journal of Mathematics.347-356engArtigo10.2140/pjm.1989.138.3472-s2.0-84974001512