Caragiannis, Ioannis; Kaklamanis, Christos; Kyropoulou, Maria Tight approximation bounds for combinatorial frugal coverage algorithms. (English) Zbl 1275.90077 J. Comb. Optim. 26, No. 2, 292-309 (2013). MSC: 90C27 90C59 PDFBibTeX XMLCite \textit{I. Caragiannis} et al., J. Comb. Optim. 26, No. 2, 292--309 (2013; Zbl 1275.90077) Full Text: DOI Link
Caragiannis, Ioannis; Monaco, Gianpiero A 6/5-approximation algorithm for the maximum 3-cover problem. (English) Zbl 1269.90090 J. Comb. Optim. 25, No. 1, 60-77 (2013). MSC: 90C27 90C59 PDFBibTeX XMLCite \textit{I. Caragiannis} and \textit{G. Monaco}, J. Comb. Optim. 25, No. 1, 60--77 (2013; Zbl 1269.90090) Full Text: DOI