@article{AIHPA_1990__53_1_35_0,
     author = {Kosmann-Schwarzbach, Yvette and Magri, Franco},
     title = {Poisson-Nijenhuis structures},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {35--81},
     publisher = {Gauthier-Villars},
     volume = {53},
     number = {1},
     year = {1990},
     mrnumber = {1077465},
     zbl = {0707.58048},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPA_1990__53_1_35_0/}
}