#### Volume 13, issue 2 (2013)

 1 M Bökstedt, W C Hsiang, I Madsen, The cyclotomic trace and algebraic $K$-theory of spaces, Invent. Math. 111 (1993) 465 MR1202133 2 V Drinfeld, On the notion of geometric realization, Mosc. Math. J. 4 (2004) 619, 782 MR2119142 3 Z Fiedorowicz, J L Loday, Crossed simplicial groups and their associated homology, Trans. Amer. Math. Soc. 326 (1991) 57 MR998125 4 J Milnor, The geometric realization of a semi-simplicial complex, Ann. of Math. 65 (1957) 357 MR0084138 5 G Segal, Configuration-spaces and iterated loop-spaces, Invent. Math. 21 (1973) 213 MR0331377 6 J Spaliński, Homotopy theory of dihedral and quaternionic sets, Topology 39 (2000) 557 MR1746909