Gregor Erbach. Natural Language Understanding in LILOG: An Intermediate Overview.  Technical report, IWBS Report 137, IBM Deutschland GmbH, Stuttgart,   1990.
 @TechReport{Erbach:1990_2,
        AUTHOR = {Erbach, Gregor},
        TITLE = {Natural Language Understanding in LILOG: An Intermediate Overview},
        YEAR = {1990},
        NUMBER = {137},
        PAGES = {43-47},
        ADDRESS = {Stuttgart},
        TYPE = {IWBS Report},
        INSTITUTION = {IBM Deutschland GmbH} } 
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