Sergio Balari. Agreement and Theta-Roles: Towards an Account of Null Subjects in HPSG.  Technical report, CLAUS-Report 25, Universität des Saarlandes, Saarbrücken, July  1992.
 @TechReport{Balari:1992,
        AUTHOR = {Balari, Sergio},
        TITLE = {Agreement and Theta-Roles: Towards an Account of Null Subjects in HPSG},
        YEAR = {1992},
        MONTH = {July},
        NUMBER = {25},
        ADDRESS = {Saarbrücken},
        TYPE = {CLAUS-Report},
        INSTITUTION = {Universität des Saarlandes} } 
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