Steiner minimal trees. by Cieslik, Dietmar Nonconvex Optimization and its Applications23 (1998) 1-319 05C05 (68R10)
Treewidth. Computations and approximations. by Kloks, Ton Lecture Notes in Computer Science842 (1994) 1-209 05C05 (05C75 68-02 68Q20 68Q25 68R10)
Minimal networks. The Steiner problem and its generalizations. by Ivanov, Alexandr O., Tuzhilin, Alexei A. CRC Press, Boca Raton, FL (1994) 1-414 05C05 (52-02 90-02 90B10 90C35)
The Steiner tree problem. by Hwang, Frank K., Richards, Dana S., Winter, Pawel Annals of Discrete Mathematics53 (1992) 1-339 05C05 (68Q25 68R10)
Trees and proximity representations. With a preface by Michel Minoux. Translated from the French by Gregor Lawden. by Barthélémy, Jean-Pierre, Guénoche, Alain Wiley-Interscience Series in Discrete Mathematics and Optimization. John Wiley & Sons, Ltd., Chichester (1991) 1-238 05C05 (68T30)
Graphes de comparabilité d'arbres et d'arborescences. (French) by Arditti, Jean-Claude Thèse de Doctorat d'État, U.E.R. Mathématique, Université Paris XI, Orsay31 (1975) 1-131 05C05
Derevya: osnovnye ponyatiya, svoistva i algoritmy. (Russian) [Trees: basic concepts, properties and algorithms] by Evstigneev, V. A., Kasyanov, V. N. Novosibirsk. Gos. Univ., Novosibirsk (1992) 1-80 05C05 (68R10)