TY  - RPRT
TI  - Generalized Homology Groups.
AU  - W Mayer
AU  - A D Campbell
PY  - 1940
DO  - 10.1073/pnas.26.11.655
UR  - https://pubmed.ncbi.nlm.nih.gov/16577990/
ID  - 16577990
ER  -