1. North-Holland Mathematics Studies;A Wilansky,1984
2. Malkowsky, E, Rakočević, V: An introduction into the theory of sequence spaces and measures of noncompactness. In: Zbornik Radova, vol. 9, pp. 143-234. Mat. Institut SANU, Beograd (2000)
3. Lecture Notes in Pure and Appl. Math.;J Banaś,1980
4. Banaś, J, Mursaleen, M: Sequence Spaces and Measures of Noncompactness with Applications to Differential and Integral Equations. Springer, New Delhi (2014)
5. Goldenštein, LS, Gohberg, IT, Markus, AS: Investigations of some properties of bounded linear operators with their q-norms. Učen. Zap. Kishinevsk. Univ. 29, 29-36 (1957)