Balan, Stefan <br/><br/>
mechanical density method in the elasto-plastic design of s-tructures / Stefan Balan, Valeriu Petcu 

 - [Bucarest, Rumania] : [Institute for Constructions of Bucharest] 
 - [24] p. 
<br/><br/> "Symposium on Plastic Analysis of Structures, JASSY 6-8 sep-tember 1972, Romania".