1. [A-T] F. J. Almgren, Jr., and Jean E. Taylor, The geometry of soap films and soap bubbles, Scientific American, July, 1976, 82–93.
2. On the existence and regularity of fundamental domains with least boundary area;Choe, Jaigyoung;J. Differential Geom.,1989
3. Poincaré’s problem and the length of the shortest closed geodesic on a convex hypersurface;Croke, Christopher B.;J. Differential Geometry,1982
4. Shortening embedded curves;Grayson, Matthew A.;Ann. of Math. (2),1989
5. [H-M] J. Hass and F. Morgan, Geodesics and soap bubbles on surfaces (Math. Z., to appear).