Reich, E. Henrik Ibsens Dramen. p. 260-82.
Roberts, R. E. Henrik Ibsen. Ch. 6.
Sarolea, C. Henrik Ibsen, p. 67-72.
Scalinger, G. M. Ibsen: studio critico. p. 41-44.
Schack, A. Om udviklingsgangen i Ibsens digtning. p. 119-37.
Schmitt, E. H. Ibsen als Prophet, p. 296-306.
Shaw, G. B. Quintessence of Ibsenism. p. 96-100.
Woerner, R. Henrik Ibsen, v. 2. p. 121-138.
Ethics. See also Moral ideas; Philosophy; Religion.