JAIN, P.K. and SINHA, D.P. 1990. SOME CHARACTERIZATIONS OF UNCONDITIONAL SCHAUDER DECOMPOSITIONS OF BANACH SPACES. Tamkang Journal of Mathematics. 21, 4 (Dec. 1990), 359–363. DOI:https://doi.org/10.5556/j.tkjm.21.1990.4683.