# On mixed <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si3.svg"><mml:mrow><mml:msub><mml:mi>ℓ</mml:mi><mml:mn>1</mml:mn></mml:msub><mml:mo linebreak="goodbreak">/</mml:mo><mml:msub><mml:mi>ℓ</mml:mi><mml:mo>−</mml:mo></mml:msub></mml:mrow></mml:math> fault detection observer design for positive 2D Roesser systems: Necessary and sufficient conditions

> Research article (Journal of the Franklin Institute, 2021) · cited 16× · AI/ML

**Wikidata**: [openalex:W3128470539](https://www.wikidata.org/wiki/openalex:W3128470539)  
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