Cameron, Naiomi T.; Matthews, Lynnell S. A Motzkin variation on the tennis ball problem. (English) Zbl 1324.05008 Ars Comb. 114, 145-152 (2014). MSC: 05A19 05A05 11B39 PDFBibTeX XMLCite \textit{N. T. Cameron} and \textit{L. S. Matthews}, Ars Comb. 114, 145--152 (2014; Zbl 1324.05008)
Merlini, D.; Sprugnoli, R.; Verri, M. C. The tennis ball problem. (English) Zbl 1006.05007 J. Comb. Theory, Ser. A 99, No. 2, 307-344 (2002). Reviewer: Timothy R.Walsh (Montréal) MSC: 05A15 05A05 PDFBibTeX XMLCite \textit{D. Merlini} et al., J. Comb. Theory, Ser. A 99, No. 2, 307--344 (2002; Zbl 1006.05007) Full Text: DOI Link
Mallows, Colin L.; Shapiro, Lou Balls on the lawn. (English) Zbl 0923.05004 J. Integer Seq. 2, Art. 99.1.5 (1999). Reviewer: L.A.Székely (Columbia/South Carolina) MSC: 05A15 05A19 PDFBibTeX XMLCite \textit{C. L. Mallows} and \textit{L. Shapiro}, J. Integer Seq. 2, Art. 99.1.5 (1999; Zbl 0923.05004) Full Text: EuDML EMIS