On the reconstruction of countable forests. F. Harary; A.J. Schwenk; R.L. Scott — 1972 Publications de l'Institut Mathématique [Elektronische Ressource]
A Maximal Toroidal Graph which is not a Triangulation. F. Harary; P.C. Kainen; A.J. Schwenk — 1973 Mathematica Scandinavica