P6- and triangle-free graphs revisited: structure and bounded clique-width. - Andreas Brandstädt; Tilo Klembt; Suhail Mahfud (Discret. Math. Theor. Comput. Sci., 2006)

Independent Sets of Maximum Weight in Apple-Free Graphs. - Andreas Brandstädt; Tilo Klembt; Vadim V. Lozin; Raffaele Mosca (ISAAC, 2008)

On Independent Vertex Sets in Subclasses of Apple-Free Graphs. - Andreas Brandstädt; Tilo Klembt; Vadim V. Lozin; Raffaele Mosca (Algorithmica, 2010)