Mechanism of the Loss of Energy by Collisions in a Material Medium (I)
      
     
          
      
      O Brasil e a nova crise do petróleo
      
     
          
      
      O Dilema da Energia Nuclear
      
     
          
      
      O Futuro Energético Brasileiro
      
     
          
      
      O fim das ilusões nucleares
      
     
          
      
      O sonho nuclear da tecnoburocracia brasileira
      
     
          
      
      On the General Theory of Damping in Quantum Mechanics
      
     
          
      
      On the Ultra-soft component of the cosmic radiation
      
     
          
      
      On the evolution of the main-sequence stars
      
     
          
      
      On the grassmann and clifford algebras I