2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/203946We construct the explicit free field representations of the current algebras $so(2n)_k$, $so(2n+1)_k$ and $sp(2n)_k$ for a generic positive integer $n$ and an arbitrary level $k$. The corresponding energy-momentum tensors and screening currents of the first kind are also given in terms of free fields.Latex file, 25 pagesHigh Energy Physics - Theorytext