Аннотация:For each $n \ge 3$, three nonequivalent polynomials $f \in \mathbb{Q}[x]$ of degree $n$ were previously constructed for which $\sqrt{f}$ has a periodic continued fraction expansion in the field $\mathbb{Q}((x))$.In article, for each $n \ge 5$, two new polynomials $f \in K[x]$ of degree $n$ are found, defined over the field $K$, $[K : \mathbb{Q}] = [(n-1)/2]$, for which $\sqrt{f}$ has a periodic continued fraction expansion in the field $K((x))$.