Fisher -Neyman Factorization Theorem is:
A statistic $T(Y)$ is sufficient for $θ$ if and only if for all $θ\in Θ$ and all $y\in \Omega$ , there is
$$ L(\theta; y) = g(T(y);\theta)h(y) $$
where g(.,.)$g(.;.)$ depends on $T(y)$ and $\theta$, and h(.)$h(.)$ does not depend on $\theta$
My question is how to prove the Fisher-Neyman factorization theorem in the continuous case?