Interested in Dutch related languages? The following link will lead you to the digital bibliography of linguistics of Afrikaans.
With regard to the study of similarities between Dutch related languages, F. Ponelis, 1988. ‘Afrikaans en Taalversteuring’, in: Tydskrif vir Geesteswetenskappe , 28 (2) : 119-149, Jun. is of interest. The full text is also available on the page Scanned publications.
In 1989 Ian Robertson published his article ‘Berbice and Skepi Dutch, a lexical comparison’ in Tijdschrift voor Nederlandse Taal- en Letterkunde. As far as I know it is the best source for the lexicon of Skepi Dutch, the Dutch related Creole of which we know so little.
In this article the lexicon of these two Guyanese Creole languages are also compared to that of Virgin Islands Dutch Creole. A Zeelandic lexifier has already been linked to all three languages, however Skepi Dutch and Virgin Islands Dutch Creole seem to be closer related than Berbice and Skepi Dutch. The past years especially Peter Bakker (Aarhus University, Denmark) studied the links between these languages.
The article is digitally available on the so-called Digitale Bibliotheek voor de Nederlandse Letteren. You can find the link it here: Robertson 1989
