@article{JLT_2011_21_4_JLT_2011_21_4_a1,
     author = {I. Beltita and D. Beltita },
     title = {On {Differentiability} of {Vectors} in {Lie} {Group} {Representations}},
     journal = {Journal of Lie theory},
     pages = {771--785},
     publisher = {mathdoc},
     volume = {21},
     number = {4},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/JLT_2011_21_4_JLT_2011_21_4_a1/}
}