PT - JOURNAL ARTICLE AU - Roy A. Sorensen TI - An “Essential Reservation” about the EMH AID - 10.3905/jpm.1983.408926 DP - 1983 Jul 31 TA - The Journal of Portfolio Management PG - 29--30 VI - 9 IP - 4 4099 - https://pm-research.com/content/9/4/29.short 4100 - https://pm-research.com/content/9/4/29.full