SUR LES PROPRIETES DE BAR-HILLEL, PERLES ET SHAMIRPAUN G.1976; STUD. CERC. MAT.; ROMAN; DA. 1976; VOL. 28; NO 3; PP. 303-309; ABS. ANGL.; BIBL. 11 REF.Article

SOME PROPERTIES OF THE CLASS OF L LANGUAGES WITH INTERACTIONS.ROZENBERG G; LEE KP.1975; J. COMPUTER SYST. SCI.; U.S.A.; DA. 1975; VOL. 11; NO 1; PP. 129-147; BIBL. 10 REF.Article

PUMPING LANGUAGES.KL NONOVE T.1977; INTERNATION. J. COMPUTER MATH.; U.S.A.; DA. 1977; VOL. 6; NO 2; PP. 115-125; BIBL. 6 REF.Article

TOPOLOGIES ON FORMAL LANGUAGES.WALTER H.1975; MATH. SYST. THEORY; U.S.A.; DA. 1975; VOL. 9; NO 2; PP. 142-158; BIBL. 9 REF.Article

A GRAMMATICAL CHARACTERIZATION OF EXPONENTIAL-TIME LANGUAGES.ROUNDS WC.1975; IN: ANNU. SYMP. FOUND. COMPUT. SCI. 16; BERKELEY, CALIF.; 1975; NEW YORK; INST. ELECTR. ELECTRON. ENG.; DA. 1975; PP. 135-143; BIBL. 12 REF.Conference Paper