1. Alt, H. W., Verzweigungspunkte von H-Flächen. I: Math. Z. 127, 333–362 (1972). II: (to appear).
2. gemGulliver, R., Regularity of minimizing surfaces of prescribed mean curvature. Ann. of Math. (to appear).
3. gemGulliver, R., R. gemOsserman, & H. gemRoyden, A theory of branched immersions of surfaces, (to appear).
4. Gulliver, R., & J. Spruck, Existence theorems for parametric surfaces of prescribed mean curvature. Ind. Univ. Math. J. 22, 445–472 (1972).
5. Heinz, E., Über das Randverhalten elliptischer Systeme mit isothermen Parametern. Math. Z. 113, 99–105 (1970).