@article{JIS_2017__20_3_a2,
     author = {Celeste, Richell O. and Corcino, Roberto B. and Gonzales, Ken Joffaniel M.},
     title = {Two approaches to normal order coefficients},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2017__20_3_a2/}
}