1. Sulla “piccola variazione” di una curva piana algebrica reali;Brusotti;Rend. Rom. Ac. Lincei,1921
2. Curves with nodes, cusps and ordinary triple points;Gradolato;Ann. Univ. Ferrara,1985
3. On the curve of 5th order with 5 cusps;Gudkov;Func. Anal. Appl.,1982
4. Une conjecture pour la cohomologie des diviseurs sur les surfaces rationelles génériques;Hirschowitz;J. rein. angew. Math.,1989