International journal of circuit theory and applications. 2000;28(5):513-518. doi: 10.1002/1097-007x(200009/10)28:5<513::aid-cta119>3.0.co;2-# Q31.62025
Linear shift-invariant input–output maps do not necessarily commute
DOI: 10.1002/1097-007x(200009/10)28:5<513::aid-cta119>3.0.co;2-#
摘要