@article{ZNSL_1998_251_a8,
     author = {H. Frahm and M. P. Pfannm\"uller},
     title = {Generalizations of the {Supersymmetric} $t$--$J$ {Model}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {94--104},
     publisher = {mathdoc},
     volume = {251},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1998_251_a8/}
}