@incollection{JEDP_1999____A3_0,
     author = {H\r{a}kan Hedenmalm},
     title = {An {Hadamard} maximum principle for the biplacian on hyperbolic manifolds},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {3},
     pages = {1--5},
     publisher = {Universit\'e de Nantes},
     year = {1999},
     mrnumber = {1718958},
     language = {en},
     url = {https://proceedings.centre-mersenne.org/item/JEDP_1999____A3_0/}
}