K. N. Mikhalev, S. A. Lekomtsev, A. P. Gerashchenko, A. Yu. Yakubovskii, A. R. Kaul, “Short-range magnetic order in LaMn(O$_{1-x}$F$_x)_3$ from $^{139}$La and $^{19}$F NMR data”, Pis'ma v Zh. Èksper. Teoret. Fiz., 77:8 (2003), 475–478; JETP Letters, 77:8 (2003), 401–404
