For $n \ge 2$, $p$ prime greater than 2, and $m \ge 1$, let $SL_n(p^m)$ be the Special Linear group of degree $n$ over the finite field of order $p^m$ (that is, $n\times n$ matrices with entries in $\mathbb{F}_{p^m}$ and determinant equal to 1).
From this Chiaselotti's paper, I already know presentations for $n \ge 3$, but I am interested in the case $n = 2$.
So, is there any (hopefully simple) known presentation to $SL_2(p^m)$?