The bi-embeddability relation for finitely generated groups. - Simon Thomas 001; Jay Williams (J. Lond. Math. Soc., 2013)

Universal Countable Borel quasi-Orders. - Jay Williams (J. Symb. Log., 2014)

The bi-embeddability relation for finitely generated groups II. - Simon Thomas 001; Jay Williams (Arch. Math. Log., 2016)