#### Volume 3, issue 2 (2003)

 1 V I Arnol’d, The cohomology ring of the group of dyed braids, Mat. Zametki 5 (1969) 227 MR0242196 2 F Chapoton, A Hopf operad of forests of binary trees and related finite-dimensional algebras, J. Algebraic Combin. 20 (2004) 311 MR2106963 3 W Y C Chen, V J W Guo, Bijections behind the Ramanujan polynomials, Adv. in Appl. Math. 27 (2001) 336 MR1868969 4 F R Cohen, The homology of $\mathcal{C}_{n+1}$–spaces, $n{\geq}0$, from: "The homology of iterated loop spaces" (editors F R Cohen, T J Lada, J P May), Lecture Notes in Mathematics 533, Springer (1976) 207 MR0436146 5 F R Cohen, Artin's braid groups, classical homotopy theory, and sundry other curiosities, from: "Braids (Santa Cruz, CA, 1986)", Contemp. Math. 78, Amer. Math. Soc. (1988) 167 MR975079 6 S Fomin, A N Kirillov, Quadratic algebras, Dunkl elements, and Schubert calculus, from: "Advances in geometry", Progr. Math. 172, Birkhäuser (1999) 147 MR1667680 7 M Gerstenhaber, A A Voronov, Homotopy $G$–algebras and moduli space operad, Internat. Math. Res. Notices (1995) 141 MR1321701 8 M Markl, Distributive laws and Koszulness, Ann. Inst. Fourier (Grenoble) 46 (1996) 307 MR1393517 9 O Mathieu, The symplectic operad, from: "Functional analysis on the eve of the 21st century, Vol. 1 (New Brunswick, NJ, 1993)", Progr. Math. 131, Birkhäuser (1995) 223 MR1373005 10 A N Varchenko, I M Gel’fand, Heaviside functions of a configuration of hyperplanes, Funktsional. Anal. i Prilozhen. 21 (1987) 1, 96 MR925069 11 A A Voronov, The Swiss-cheese operad, from: "Homotopy invariant algebraic structures (Baltimore, MD, 1998)", Contemp. Math. 239, Amer. Math. Soc. (1999) 365 MR1718089