Boundedness of superposition operators on some sequence spaces defined by moduliRaidjõe, AnnemaiDemonstratio mathematica2006 / 4, p. 869-886 https://www.degruyter.com/document/doi/10.1515/dema-2006-0417/html F-seminorms on generalized double sequence spaces defined by modulus functionsKolk, Enno; Raidjõe, AnnemaiProceedings of the Estonian Academy of Sciences2014 / p. 121-132 Sequence spaces defined by modulus functions and superposition operatorsRaidjõe, Annemai2006 https://www.ester.ee/record=b2166664*est