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Studies of piecewise continuous tangent aggregations of clipped doubly-ruled surfaces
2013
 
                  
                    
                 
                  
                    
                 
                  
                    
                 
                  
                    
                 
                  
                    
                 
                  
                    
                 
                  
                    
                 
                  
                    
                 
                  
                    
                 
                  
                    
                 
                  
                    
                Studies of piecewise continuous tangent aggregations of clipped doubly-ruled surfaces
2013