RT Journal Article SR Electronic T1 On the empirical relevance of APT JF The Journal of Portfolio Management FD Institutional Investor Journals SP 70 OP 71 DO 10.3905/jpm.1985.409018 VO 11 IS 4 A1 Phoebus J. Dhrymes YR 1985 UL https://pm-research.com/content/11/4/70.abstract AB