Kohgi, M., Iwasa, K., Mignot, J.-M., Fåk, B., Gegenwart, P., Lang, M., et al. (2001). Staggered Field Effect on the One-Dimensional S = 1/2 Antiferromagnet Yb4As3. Physical Review Letters, 86(11), 2439-2442. doi:10.1103/PhysRevLett.86.2439.