Super reg question -- on references

in an article appearing in the late 1990's a fellow ham radio op used multilple Thaler voltage references (don't worry, you won't be able to find them) to reduce the noise, tempco effects and improve acuracy. The result was a DIY voltage measurement unit which was approaching the acuracy of high end HP, Keithley and Fluke equipment.

how would this affect the "noise" of the Super-Reg if one were to combine multiple references, RC filtering with an ultra-low noise error amp (like the AD797)?