Codimension 1 Orbits and Semi-Invariants for the Representations of an Oriented Graph of Type n
S. Abeasis · Transactions of the American Mathematical Society · 1984
S. Abeasis, Codimension 1 Orbits and Semi-Invariants for the Representations of an Oriented Graph of Type $\mathcal{A}_n$, Transactions of the American Mathematical Society, Vol. 282, No. 2 (Apr., 1984), pp. 463-485