Havas, G., & Vaughan-Lee, M. (2009). On counterexamples to the Hughes conjecture. Elsevier.
Chicago-čujuhus (17. p.)Havas, G., juo M. Vaughan-Lee. On Counterexamples to the Hughes Conjecture. Elsevier, 2009.
MLA-čujuhus (9. p.)Havas, G., juo M. Vaughan-Lee. On Counterexamples to the Hughes Conjecture. Elsevier, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.