Can citric acid create a polyester? Citric acid has both alcohol and carboxylic acid groups, so could it "esterify" with the other citric acid molecules in solution?

I notice that it is a tertiary alcohol. I don't suppose that would significantly hinder esterification, would it? Then again, it's not as if citric acid simply polymerizes with other citric acid  molecules in solution anyway.
The esterification of carboxylic acids with tertiary alcohols usually occurs by an SN1 mechanism wherein the oxygen of the alcohol is protonated and a tertiary carbocation is formed. It in turn reacts with the carboxylic acid to form the tertiary ester. The hydroxyl group in citric acid, while tertiary, is alpha to a carboxyl group. A cation alpha to a carboxyl group (-CO2H) is a destabilized entity. This mechanism would be precluded. Traditional Fischer esterification is likely sluggish owing to steric hinderance.