Consider other works of Ibsen's, including The Pillars of Society, his first realist play. Other thematically and structurally similar works of Ibsen's include Hedda Gabbler and The Wild Duck.
Consider other realistic plays about family relationships, including Anton Chekhov's The Cherry Orchard and The Seagull, Strindberg's The Father, Eugene O'Neill's Long Day's Journey Into Night, and Tracy Letts's August: Osage County.