Doran R.S. <br/><br/>
Approximate Identities and Factorization in Banach Modules. 
Doran R.S., Wichmann J. 
 - Berlin et al  Springer-Verlag  1979 
 - 305 p. 
<br/><br/> Lecture Notes in Mathematics V.768 
<br/><br/><label>Dewey Class. No.: </label>517.982/Berb.