PT  - JOURNAL ARTICLE
AU  - Richard Roll
TI  - Vas Ist Das?
AID  - 10.3905/jpm.1983.18
DP  - 1983 Jan 31
TA  - The Journal of Portfolio Management
PG  - 18--28
VI  - 9
IP  - 2
4099  - https://pm-research.com/content/9/2/18.short
4100  - https://pm-research.com/content/9/2/18.full