Vorster, S. J. R.; Wille, R. J. Primitive topological categories. (English) Zbl 0236.18008 Nederl. Akad. Wet., Proc., Ser. A 75, 176-187 (1972). MSC: 18F10 PDFBibTeX XMLCite \textit{S. J. R. Vorster} and \textit{R. J. Wille}, Nederl. Akad. Wet., Proc., Ser. A 75, 176--187 (1972; Zbl 0236.18008)
Wille, R. J.; Vorster, S. J. R. Tensor products in primitive categories. (English) Zbl 0222.18007 Nederl. Akad. Wet., Proc., Ser. A 73, 110-115 (1970). MSC: 18B99 PDFBibTeX XMLCite \textit{R. J. Wille} and \textit{S. J. R. Vorster}, Nederl. Akad. Wet., Proc., Ser. A 73, 110--115 (1970; Zbl 0222.18007)
Wille, R. J. Topological groups with prescribed automorphism groups. (English) Zbl 0114.02203 Nederl. Akad. Wet., Proc., Ser. A 66, 218-224 (1963). PDFBibTeX XMLCite \textit{R. J. Wille}, Nederl. Akad. Wet., Proc., Ser. A 66, 218--224 (1963; Zbl 0114.02203)
Wille, R. J. On the integration of Ahlfors’ inequality concerning covering surfaces. (English) Zbl 0078.06801 Nederl. Akad. Wet., Proc., Ser. A 60, 108-111 (1957). PDFBibTeX XMLCite \textit{R. J. Wille}, Nederl. Akad. Wet., Proc., Ser. A 60, 108--111 (1957; Zbl 0078.06801)
Wille, R. J. Sur les espace faiblement rétractiles. (French) Zbl 0056.41503 Nederl. Akad. Wet., Proc., Ser. A 57, 527-532 (1954). PDFBibTeX XMLCite \textit{R. J. Wille}, Nederl. Akad. Wet., Proc., Ser. A 57, 527--532 (1954; Zbl 0056.41503)
Wille, R. J. Sur la transformation intérieure d’une surface non orientable sur le plan projectif. (French) Zbl 0050.17803 Indag. Math. 15, 63-65 (1953); Nederl. Acad. Wet., Proc., Ser. A 56, 63-65 (1953). PDFBibTeX XMLCite \textit{R. J. Wille}, Nederl. Akad. Wet., Proc., Ser. A 56 (Indag. Math. 15), 63--65 (1953; Zbl 0050.17803)
Wille, R. J. On the number of doublepoints of analytic curves. (English) Zbl 0042.31703 Nederl. Akad. Wet., Proc., Ser. A 54, 178-183 (1951); Indagationes Math. 13, 178-183 (1951). PDFBibTeX XMLCite \textit{R. J. Wille}, Nederl. Akad. Wet., Proc., Ser. A 54 (Indag. Math. 13), 178--183 (1951; Zbl 0042.31703)