The tPeP (Journal for Client-centered Psychotherapy) is the scientific journal for Dutch and Flemish
psychotherapists, psychologists, and psychiatrists, that work from, or are interested in a client-centered perspective.
The tijdschrift Persoonsgerichte Experiëntiële Psychotherapie (tPeP) is the journal
of the Society for Person Centered & Experiential Psychotherapy (VPEP)
and the Flemish Society for Client-Centered/Experiential Psychotherapy and Counseling (VVCEPC).

Here you can find many open-access articles

(Process-oriented, Existential, Interactional, Integrative)

https://www.tpep.nl/en/articles/