Cīrulis, J. A system of logic permitting vacuous and plural terms. (Russian) Zbl 0553.03002 Z. Math. Logik Grundlagen Math. 31, 263-274 (1985). MSC: 03B10 03B60 03C35 PDFBibTeX XMLCite \textit{J. Cīrulis}, Z. Math. Logik Grundlagen Math. 31, 263--274 (1985; Zbl 0553.03002) Full Text: DOI
Cirulis, J. Logic with inclusion. III. (English) Zbl 0465.03001 Z. Math. Logik Grundlagen Math. 25, 163-172 (1979). MSC: 03B15 PDFBibTeX XMLCite \textit{J. Cirulis}, Z. Math. Logik Grundlagen Math. 25, 163--172 (1979; Zbl 0465.03001) Full Text: DOI
Cīrulis, Jānis Logic with inclusion. II. (Russian) Zbl 0394.03015 Z. Math. Logik Grundlagen Math. 24, 225-236 (1978). MSC: 03B15 PDFBibTeX XMLCite \textit{J. Cīrulis}, Z. Math. Logik Grundlagen Math. 24, 225--236 (1978; Zbl 0394.03015) Full Text: DOI
Cīrulis, Jānis Logic with inclusion. (Russian) Zbl 0308.02014 Z. Math. Logik Grundlagen Math. 21, 247-266 (1975). MSC: 03B10 03B15 03A05 PDFBibTeX XMLCite \textit{J. Cīrulis}, Z. Math. Logik Grundlagen Math. 21, 247--266 (1975; Zbl 0308.02014) Full Text: DOI