@article{EXMATH_2008_2008_1_a3,
     author = {Chalendar, I. and  Fricain, E. and  Timotin, D.},
     title = {A note on the stability of linear combinations of algebraic operators. },
     journal = {Extracta mathematicae},
     pages = {43-48},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_2008_2008_1_a3/}
}