%0 Journal Article %A Ovsepian, R. I. %A Pełczyński, A. %T The existence in every separable Banach space of a fundamental total and bounded biorthogonal sequence and related constructions of uniformly bounded orthonormal systems in $L^2$ %J Séminaire Maurey-Schwartz %Z talk:20 %D 1973-1974 %P 1-15 %I Ecole Polytechnique, Centre de Mathématiques %U http://www.numdam.org/item/SAF_1973-1974____A22_0/ %G en %F SAF_1973-1974____A22_0