Should I say "few literature" or "little literature"? I am currently writing an introduction section, which says "this is an important question but currently there is few (or little?) literature available".

Which one should I use, few or little?

Thank you!
Little literature is common. You could also say "there is a paucity of literature on this problem"; "the literature on this problem is
scarce,
sparse, or
still in its infancy!"; or as @AliJamali and @paulgarret suggested, limited or scant literature.