TY  - RPRT
TI  - Minimal Surfaces Spanning Closed Manifolds.
AU  - R Courant
AU  - N Davids
PY  - 1940
DO  - 10.1073/pnas.26.3.194
UR  - https://pubmed.ncbi.nlm.nih.gov/16588337/
ID  - 16588337
ER  -