TY - JOUR AU - Amedeo Altavilla AU - Cinzia Bisi TI - Log-biharmonicity and a Jensen formula in the space of quaternions JO - Annales Fennici Mathematici PY - 2019 SP - 805–839 EP - 805–839 VL - 44 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.5186/aasfm.2019.4447/ DO - 10.5186/aasfm.2019.4447 LA - en ID - AFM_2019_44_2_a12 ER -