no. 3
Two near-isometry invariants of Banach spaces
Compositio Mathematica, Tome 22 (1970) no. 3, pp. 265-268. 
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     author = {McGuigan, Jr., Robert A.},
     title = {Two near-isometry invariants of {Banach} spaces},
     journal = {Compositio Mathematica},
     pages = {265--268},
     publisher = {Wolters-Noordhoff Publishing},
     volume = {22},
     number = {3},
     year = {1970},
     mrnumber = {273371},
     zbl = {0199.18401},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1970__22_3_265_0/}
}
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McGuigan, Jr., Robert A. Two near-isometry invariants of Banach spaces. Compositio Mathematica, Tome 22 (1970) no. 3, pp. 265-268. http://archive.numdam.org/item/CM_1970__22_3_265_0/

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R. Whitley [4] The Size of the Unit Sphere, Canad. J. Math. 20 (1968) 450-455. | MR | Zbl