Lancester, K. The theory of qualitative linear systems. (English) Zbl 0142.17206 Econometrica 33, 395-408 (1965). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 14 Documents Keywords:operations research × Cite Format Result Cite Review PDF Full Text: DOI