An important development in Huhn's career was when he spent the academic year 1978-79 on research leave at the University of Manitoba, working with George Grätzer. In  Grätzer writes:-
During that period, we did the research for the papers [When is a Q-amalgamated free product of lattices always a free product (1980), A note on finitely presented lattices (1980), A note on finitely presented lattices (1981), On the structure of finitely presented lattices (1981), Amalgamated free products of lattices I : The common refinement property (1982), Amalgamated free products of lattices II : Generating sets (1981), and Amalgamated free products of lattices III : Free generating sets (1984)]. Of the thirty five or so mathematicians I have collaborated with, András certainly stands out as one of the most pleasant, most co-operative, and most talented. I believe that these papers made a significant contribution to the theory of finitely presented lattices and to the theory of amalgamated free products of lattices. the basic problems we have been working on have not yet been completely solved.Tamás Schmidt writes in :-
In the last years of his life [Huhn] studied the characterisation problem of congruence lattices of lattices. First he found a new proof for my theorem that the ideal lattice of a distributive lattice is the congruence lattice of a lattice. for this proof he gave a very interesting representation theorem for finite distributive lattices.Huhn was on the editorial board of Algebra Universalis and of Acta Scientiarum Mathematicum Szeged. He also edited two proceeding of lattice theory conferences in Szeged of which he was an organiser. The first was the Colloquium Lattice theory held in Szeged from 27 August to 30 August 1974. The second of the two editors of these proceedings was Tamás Schmidt.
When at the height of his creative powers at the age of 38, Huhn was killed in a tragic accident :-
He is survived by his wife, Gabi, and his two children, Gábor, aged 5, and Zsófia, aged 4.
Article by: J J O'Connor and E F Robertson