RETRIEVAL LANGUAGESLOCKEMANN PC.1977; DATA DOCUMENTATION: SOME PRINCIPLES AND APPLICATIONS IN SCIENCE AND INDUSTRY. WORKSHOP ON DATA DOCUMENTATION/1975/REISENSBURG CASTLE; DEU; MUENCHEN: VERLAG DOKUMENTATION; DA. 1977; PP. 64-65Conference Paper

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ACCESS TO DATA BASE SYSTEMS VIA NATURAL LANGUAGEKRAGELOH KD; LOCKEMANN PC.1978; LECTURE NOTES COMPUTER SCI.; DEU; DA. 1978; NO 63; PP. 49-86; BIBL. 3 P.Article

FORMAL MODELLING OF DISCRETE DYNAMIC SYSTEMS.MAYR HC; LOCKEMANN PC.1977; IN: MODELLING PERFORMANCE EVAL. COMPUT. SYST. INT. WORKSHOP. PROC.; ISPRA; 1976; AMSTERDAM; NORTH-HOLLAND; DA. 1977; PP. 255-266; BIBL. 16 REF.Conference Paper

TRENDS IN INFORMATION PROCESSING SYSTEMS. 3RD CONFERENCE OF THE EUROPEAN COOPERATION IN INFORMATICS, MUNICH, OCTOBER 20-22, 1981. PROCEEDINGSDUIJVESTIJN AJW ED; LOCKEMANN PC ED.1981; LECTURE NOTES IN COMPUTER SCIENCE; ISSN 0302-9743; DEU; DA. 1981; NO 123; 360 P.; BIBL. DISSEM.Conference Paper

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DATA ABSTRACTIONS FOR DATABASE SYSTEMSLOCKEMANN PC; MAYR HC; WEIL WH et al.1979; A.C.M. TRANS. DATABASE SYST.; USA; DA. 1979; VOL. 4; NO 1; PP. 60-75; BIBL. 18 REF.Article