Kuiper N H

Publications in Math-Net.Ru

1. Minimal total curvature, a look at old and new results
   
   Uspekhi Mat. Nauk, 40:4(244) (1985),  49–54
2. On $C^1$-isometric imbeddings. I
   
   Matematika, 1:2 (1957),  17–28