[1] Benzi R, Sutera S and Vulpiani A 1981 J. Phys. A
14 453

[2] Hu G, Ditzinger T and Ning C Z 1993 Phys. Rev. Lett.
71 807

[3] Pikovsky A S and Kurths J 1997 Phys. Rev. Lett.
78 775

[4] Douglass J K, Wilkens L, Pantazelou E and Moss F 1993
Nature 365 337

[5] Greenwood P E, Ward L M, Russell D F, Neiman A and Moss F.
2000 Phys. Rev. Lett. 84 4773

[6] Gluckman B J, Netoff T I, Neel E J, Ditto W L, Spano M L
and Schiff S J 1996 Phys. Rev. Lett. 77 4098

[7] Gu H G, Ren W, Lu Q S, Wu S G, Yang M H and Chen W J. 2001
Phys. Lett. A 285 63

[8] Kitajo K, Nozaki D, Ward L M and Yamamoto Y 2003
Phys. Rev. Lett. 90 218103

[9] Jung P and Mayer-Kress G 1995 Phys. Rev. Lett.
74 2130

[10] Perc M. 2005 Phys. Rev. E 72 016207

[11] Wang Q Y, Perc M, Duan Z S and Chen G R 2008 Phys.
Lett. A 372 5681

[12] Sun X J, Perc M, Lu Q S and Kurths J 2008 Chaos
18 023102

[13] Wang Q Y, Duan Z S and Lu Q S 2007 Chin. Phys.
Lett. 24 2759

[14] Perc M 2005 New. J. Phys. 7 252

[15] Perc M 2005 Europhys. Lett. 72 712

[16] Vilar J M G and Rubi J M 1997 Phys. Rev. Lett.
78 1882

[17] Jiang Y 2005 Phys. Rev. E 71 057103

[18] Tateno T and Pakdaman K 2004 Chaos 14 511

[19] Tsumoto K, Kitajim H, Yoshinag T, Aihara K and Kawakami
H. 2006 Neurocomputing 69 293

[20] Gosak M. 2009 Biophys. Chem. 139 53

[21] Yu L C, Ma J, Zhang G Y and Chen Y 2008 Chin. Phys.
Lett. 25 2706

[22] Soen Y, Cohen N, Lipson D and Braun E 1999 Phys.
Rev. Lett. 82 3556

[23] Gray R A, Pertsov A M and Jalife J 1998 Nature
392 75