@article{AM2_1977__16_136683,
     author = {J.J. Andrews and R.C. Lacher},
     title = {Stacked exponents.},
     journal = {Aequationes mathematicae},
     pages = {137--148},
     publisher = {mathdoc},
     volume = {16},
     year = {1977},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AM2_1977__16_136683/}
}