@article{AMI_2007_34_a3,
     author = {Hac\`ene Belbachir and Abdelkader Khelladi},
     title = {On a sum involving powers of reciprocals of an arithmetical progression},
     journal = {Annales mathematicae et informaticae},
     pages = {29--31},
     publisher = {mathdoc},
     volume = {34},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_2007_34_a3/}
}