@article{RMC_2008_2008_1_a4,
     author = {Favini, Angelo and  Labbas, Rabah  and  Lemrabet, Keddour  and  Sadallah, Boubaker-Khaled},
     title = {Study of a complete abstract differential equation of elliptic type with variable operator coefficients, {I.}},
     journal = {Revista matem\'atica complutense},
     pages = {89-133},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMC_2008_2008_1_a4/}
}