Fritz Henglein. Algebraic Properties of Semi-Unification. SETL Newsletter Courant Institute of Mathematical Sciences, New York University, No 233, November 1988.
 
@TechReport{he88i, 
   Author = {Henglein, Fritz},
   Title = {Algebraic Properties of Semi-Unification},
   Number = {233},
   Institution = {Courant Institute of Mathematical Sciences, New York University},
   Month = {November},
   Year = {1988}
} 
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