However, there is no direct reference to A Doll's House in the obituary material. In the Wikipedia entry, only one statement directly refers to the play. However, these two last sources could still be useful as relevant, though indirect materials to aid a student doing a research paper on A Doll's House to shed light on how influences and Ibsen's life background contributed to his writing of the particular play in study.
According to the Britannica article on Henrik Ibsen, the "proper voice" of the Norwegian playwright came with the writing of A Doll's House in 1879 (par. 10). In the succeeding three paragraphs of the article, the characters, the plot, the technique used by Ibsen as well as the reaction of audiences towards the play are discussed (par. 11-13). Paragraph 11 tells about the characters and the plot of the play - Torvald Helmer and his wife Nora, with their three children and how a secret of Nora would unravel that would pave the way for revealing the true character of the people in the play.