%0 Journal Article %A Celeste, Richell O. %A Corcino, Roberto B. %A Gonzales, Ken Joffaniel M. %T Two approaches to normal order coefficients %J Journal of integer sequences %D 2017 %V 20 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/JIS_2017__20_3_a2/ %G en %F JIS_2017__20_3_a2