M. Dücker, C. Geiger, G. Lehrenfeld, W. Müller, and C. Tahedl, “A Visual Programming Language for Qualitative Data,”10.1109/VL.1997.626593__1997, doi:10.1109/VL.1997.626593 .
LibreCat: /record/39510
DOI: 10.1109/VL.1997.626593