Phase portraits of coexisting chaotic attractors of the map (5) calculated for x(0) = 1 and (i) y(0) = –28, (ii) y(0) = –22, (iii) y(0) = –16, (iv) y(0) = –9, (v) y(0) = –3, (vi) y(0) = 3, (vii) y(0) = 10, (viii) y(0) = 16, (ix) y(0) = 22, respectively.