Citation: Olivier Mentr\'e; El Mostafa Ketatni; Marie Colmont; Marielle Huv\'e; Francis Abraham; Vaclav Petricek (2006). Structural Features of the Modulated BiCu2(P1-xVx)O6 Solid Solution; 4-D Treatment of x=0.87 Compound and Magnetic Spin-Gap to Gapless Transition in New Cu2+ Two-Leg Ladder Systems. Journal of the American Chemical Society, 128, pp. 10857-10867.