In this section are my own written articles. These articles have been published in one or all three countries: the Netherlands, Germany and France. Articles are published in "Poecilia nieuws" of Poecilia Netherlands (PN), "Viviparos" of VDA Arbeitskreises Lebendgebärende Aquarienfisch (VDA-AK) and "Le vivipare" of Association France Vivipares (AFV).

An article (5 pages) of mine about mutations in livebearers has been published in the February 2020 edition of Poecilia nieuws. It's about mutations that have occurred in livebearers and if those mutations are functional or not.

An article (5 pages) of mine about superfetation has been published in the May 2020 edition of Poecilia nieuws. It's specifically about superfetation in livebearers.

An article (3 pages) of mine about mating choice and reproduction methods in livebearers has been published in the 2020-2 edition of the German livebearer magazine "Viviparos".

An article (6 pages) of mine about sex change in Xiphophorus species has been published in the September 2020 edition of Poecilia nieuws.

An article (4 pages) of mine about fishes's eyes and eyesight has been published in the November 2020 edition of Poecilia nieuws.

An article (1 page) of mine about the meeting VDA-AK & PN in Bocholt (Germany) has been published in the November 2020 edition of Poecilia nieuws.

A published datasheet of the Poecilia wingei written by me.

An article (3 pages) of mine about a wild guppy strain that has been used for lab research purposes from 1921-1927, that has been thought of to be vanished for decades has been rediscovered, has been published in the February 2021 edition of Poecilia nieuws.

Another article (4 pages) of mine about senses in fish has been published in the February 2021 edition of Poecilia nieuws.

An article (8 pages) of mine about "Male dorsals in livebearers do make a difference" has been published in the May 2021 edition of Poecilia nieuws.

An article (7 pages) of mine about hybrids between molly and guppy has been published in the September 2021 edition of Poecilia nieuws.

An article (almost 4 pages) of mine has been published in the Poecilia news (Poecilia nieuws) livebearer magazine, September 2022 issue. The article is about the Poecilia chica (dwarf molly).

An 4,5 pages article of mine has been published in the Poecilia news livebearer magazine, November 2022 issue. The article is about a wild guppy population that I've collected in Chimborazo, Barbados in April 2022.

Another article (6 pages) of mine has been published in the Poecilia news livebearer magazine, February 2023 issue. The article is about wild traits in livebearer breeding forms.