TY  - JOUR
ID  - iiasa4323
UR  - https://pure.iiasa.ac.at/id/eprint/4323/
A1  - Sigmund, K.
A1  - Nowak, M.A.
A1  - May, R.M.
Y1  - 1995///
PB  - NPG
JF  - Scientific American
SN  - 1946-7087
TI  - The arithmetics of mutual help
SP  - 50
AV  - none
EP  - 55
ER  -