Berardi, Luigia; Beutelspacher, Albrecht Constructing the biplanes of order four from six points. (English) Zbl 0646.51013 Boll. Unione Mat. Ital., VII. Ser., A 2, No. 2, 285-289 (1988). Reviewer: Th.Grundhöfer MSC: 51E05 05B05 PDFBibTeX XMLCite \textit{L. Berardi} and \textit{A. Beutelspacher}, Boll. Unione Mat. Ital., VII. Ser., A 2, No. 2, 285--289 (1988; Zbl 0646.51013)
Berardi, Luigia Irreducible blocking sets in a symmetric design. (English) Zbl 0613.05010 Boll. Unione Mat. Ital., VII. Ser., A 1, 39-47 (1987). Reviewer: G.Ferrero MSC: 05B05 51E05 51E20 PDFBibTeX XMLCite \textit{L. Berardi}, Boll. Unione Mat. Ital., VII. Ser., A 1, 39--47 (1987; Zbl 0613.05010)