Factorizations of properties of graphs. - Izak Broere; Peter Mihók; Samuel J. T. Moagi; Roman Vasky (Discuss. Math. Graph Theory, 1999)

Meet- and join-irreducibility of additive hereditary properties of graphs. - Amelie J. Berger; Izak Broere; Samuel J. T. Moagi; Peter Mihók (Discret. Math., 2002)