@article{AMI_2011_38_a1,
     author = {Nour El Houda Djaa and Seddik Ouakkas and Djaa Mustapha},
     title = {Harmonic sections on the tangent bundle of order two},
     journal = {Annales mathematicae et informaticae},
     pages = {15--25},
     publisher = {mathdoc},
     volume = {38},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_2011_38_a1/}
}