From a quick search I found [Adjugates of Diophantine Quadruples](http://vixra.org/abs/0907.0024) by Philip Gibbs, which was originally posted on the viXra and has since appeared in [INTEGERS](http://www.degruyter.com/view/j/integ.2010.10.issue-2/integ.2010.015/integ.2010.015.xml).  I do not think it meets the quota of being cited more than ten times, but according to Google Scholar, it has been cited by these two articles. 

Aguirre, J., Dujella, A. and Peral, J.C., 2012. On the rank of elliptic curves coming from rational Diophantine triples. The Rocky Mountain Journal of Mathematics, 42(6), pp.1759-1776.

Dujella, A. and Jurasić, A., 2011. Some Diophantine triples and quadruples for quadratic polynomials. Journal of Combinatorics and Number Theory, 3(2), pp.123-141.