Working on a problem I recently bumped into the family of polynomials
$p_n(x):=n!L_n^{1}(-x)$
where $L_n^{\alpha}(x)$ denotes the classical family of Laguerre (orthogonal) polynomials. In particular, I'm interested in the location of the zeros of $p_n$ (which coincide with the negatives of the zeros of $L_n^1$), at least asymptotically (i.e. for $n$ very large).
Since this lies way outside my area of expertise, does anyone know a reasonably recent reference on such problem? Or maybe the work of someone who dealt with polynomials closely related to $p_n$? Thank you all in advance.