Allebé, C., Govaerts, B., De Wolf, S., & Szlufcik, J. (2001). Statistical process control: a straightforward way to monitor processes and keep them under control. In McNelis, B.;Palz, W.; Ossenbrink, H.A.; Helm, P. (ed.), Seventeenth European Photovoltaic Solar Energy Conference:Proceedings of the Internationl Conference (p. p. 1674-1678). https://hdl.handle.net/2078.5/27816