Oostra, Arnold Subcategories generated by initial structures. (Spanish. English summary) Zbl 0837.18002 Lect. Mat. 16, No. 1, 63-72 (1995). MSC: 18A40 18B30 54B30 PDFBibTeX XMLCite \textit{A. Oostra}, Lect. Mat. 16, No. 1, 63--72 (1995; Zbl 0837.18002)
Oostra, Arnold Initial structures. (Spanish) Zbl 0795.54017 Lect. Mat. 13, No. 1-3, 85-98 (1992). Reviewer: E.Giuli (L’Aquila) MSC: 54B30 PDFBibTeX XMLCite \textit{A. Oostra}, Lect. Mat. 13, No. 1--3, 85--98 (1992; Zbl 0795.54017)