PT - JOURNAL ARTICLE AU - Marc R. Reinganum TI - Is Time Travel Impossible? A Financial Proof AID - 10.3905/jpm.1986.10 DP - 1986 Oct 31 TA - The Journal of Portfolio Management PG - 10--12 VI - 13 IP - 1 4099 - https://pm-research.com/content/13/1/10.short 4100 - https://pm-research.com/content/13/1/10.full