Complex systems : fractals, spin glasses and neural networks : proceedings of the International Conference on Complex Systems: Fractals, Spin Glasses and Neural Networks, Trieste, Italy, 2-6 July 1991 / eds. Giorgio Parisi, Luciano Pietronero, Miguel Virasoro→Fraktaly v fizike : trudy VI Mez̆dunarodnogo Simpoziuma po Fraktalam v Fizike, MCTF, Triest, Italija, 9-12 Julja, 1985 / pod red. L. Pʹetronero i Ė. Tosatti⇋Fractals in physics : proceedings of the Sixth Trieste International Symposium on Fractals in Physics, ICTP, Italy, July 9-12, 1985 / ed. by Luciano Pietronero and Erio Tosatti