Carl-Alexander Wichert. ULTRA - a logic transaction programming language. PhD thesis, University of Passau, Germany, 2000. [doi]
@phdthesis{dnb-15270, title = {ULTRA - a logic transaction programming language}, author = {Carl-Alexander Wichert}, year = {2000}, url = {http://d-nb.info/96114856X}, researchr = {https://researchr.org/publication/dnb-15270}, cites = {0}, citedby = {0}, school = {University of Passau, Germany}, }