@article{GDZPPN002347369,
title = {On a Problem of Alfsen and Fenstad.},
journal = {Mathematica Scandinavica},
volume = {13},
year = {1963},
pages = {44-46},
zbl = {0129.37605},
url = {http://dml.mathdoc.fr/item/GDZPPN002347369}
}
Leader, Solomon. On a Problem of Alfsen and Fenstad.. Mathematica Scandinavica, Tome 13 (1963) pp. 44-46. http://gdmltest.u-ga.fr/item/GDZPPN002347369/