In several articles about curves, etc, in Minkowski spaces $\Bbb L^3$ and $\Bbb L^4$, there is
Walrave, J., Curves and surfaces in Minkowski space. Doctoral Thesis, K.U. Leuven, Fac. of Science, Leuven 1995.
as a reference, but I'm having trouble finding said thesis in the internet. Since it dates from a long time ago, I think that it might not be accesible at all. And I don't even know if the author is still alive, so I could contact him (talking to the author directly worked for me before). Does someone know where to find it? I tried Library Genesis and arXiv to no avail. Looking for it, I found these references, but that's not it. I tried looking around at the university site, but I don't know Dutch.
Is there hope for me?