@article {Direct1966,
title = {Direct estimation of seasonal variation},
year = {1966},
notes = {https://doi.org/10.2307/1401256},
url = {https://www.esri.ie/publications/direct-estimation-of-seasonal-variation},
author = {Leser, C.},
journal = {Review of the International Statistical Institute, Vol. 34 No. 3, 1966},
}