@第{zbMATH00938623条，作者={Ehrenfeucht，Andrzej和P{\u{a}}un，Gheorghe和Rozenberg，Grzegorz}，标题={外部上下文语言的线性景观}，FJournal={信息学报}，日志={Acta Inf.}，ISSN={0001-5903}，体积={33}，数字={6}，页码={571--593}，年份={1996}，语言={英语}，DOI={10.1007/s002360050059}，关键词={68Q45}，zbMATH＝{938623}，Zbl={0858.68050}}