@article{10_4064_cm141_1_6,
     author = {J. B. M. Melissen and M. El Ghami},
     title = {A sequence of sharp trigonometric inequalities},
     journal = {Colloquium Mathematicum},
     pages = {61--64},
     publisher = {mathdoc},
     volume = {141},
     number = {1},
     year = {2015},
     doi = {10.4064/cm141-1-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm141-1-6/}
}