@article{CRMATH_2017__355_11_1127_0,
     author = {Qian, Guoyou},
     title = {On the sum of reciprocals of least common multiples},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {1127--1132},
     publisher = {Elsevier},
     volume = {355},
     number = {11},
     year = {2017},
     doi = {10.1016/j.crma.2017.10.015},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2017.10.015/}
}