@misc
{TN_libero_mab2,
author = {
Beukers, F.
},
title = {
On the generalized Ramanujan-Nagell equation I
},
publisher = {Institute of Mathematics, Polish Academy of Sciences},
isbn = {0065-1036},
isbn = {1730-6264},
year = {1981},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}