by Christian Elsholtz, Alan Filipin and Yasutsugu Fujita
Reference:
Christian Elsholtz, Alan Filipin and Yasutsugu Fujita, On Diophantine quintuples and $D(-1)$-quadruples, Monatshefte für Mathematik, 175, 227-239, (2014).
Bibtex Entry:
@Article{ElsholtzEtAl2014,
author = {Christian Elsholtz and Alan Filipin and Yasutsugu Fujita},
journal = {Monatshefte f\"ur Mathematik},
title = {On {D}iophantine quintuples and {$D(-1)$}-quadruples},
year = {2014},
pages = {227-239},
volume = {175},
doi = {10.1007/s00605-013-0571-5},
groups = {Project13 (Elsholtz), Faculty, External},
xxmrnumber = {3260867},
}