Geodesic
Complemented subspaces and the Hahn-Banach extension property in lp(0 < p < 1)
Glasgow mathematical journal, Tome 28 (1986) no. 2, pp. 115-120

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In this article, we study some questions related to the complementation and the Hahn-Banach property for subspaces of lp, for 0 < p < 1. Some results which are stated here have appeared in the work of W. J. Stiles [4, 5] and N. Popa [3], but our proofs are simpler. We solve a problem raised by Popa [3], concerning complemented copies of lp contained in lp. 
Ariño, M. A.; Canela, M. A. Complemented subspaces and the Hahn-Banach extension property in lp(0 < p < 1). Glasgow mathematical journal, Tome 28 (1986) no. 2, pp. 115-120. doi: 10.1017/S0017089500006431
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[1] 1.Köthe, G., Topological Vector Spaces I (Springer, 1969). Google Scholar

[2] 2.Lindenstrauss, J. and Tzafriri, L., Classical Banach Spaces I (Springer, 1977). Google Scholar | DOI

[3] 3.Popa, N., On complemented subspaces of l, 0&lt;p&lt;1, Rev. Roumaine Math. Pures Appl. 26 (1981), 287–299. Google Scholar

[4] 4.Stiles, W. J., On properties of subspaces of l,0&lt;p&lt; 1, Trans. Amer. Math. Soc. 149 (1970), 405–415. Google Scholar

[5] 5.Stiles, W. J.. Some properties of l , 0&lt;p&lt;1. Studia Math. 42 (1972), 109–119. Google Scholar

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