The music of Lazarof, who was born in Bulgaria and who completed his training in Israel, Italy and country, does not belong to any discernible national or stylistic school. He has taught for almost 30 years at the University of California at Los Angeles, once the home of Arnold Schoenberg, but Lazarof's individual music cannot be pigeon-holed as serialist. The music is thorny -- as a performance of his "Concertante II" (1988) yesterday evening at the College of Notre Dame by the Washington-based American Camerata for New Music reminded one -- but it is also witty, if rather cold, and beautifully organized.