TY JOUR TI Linear perturbations of the Bloch type of space-periodic magnetohydrodynamic steady states. III. Asymptotics of branching KW Power series expansion KW asymptotics KW kinematic dynamo problem KW Bloch magnetic mode KW branching KW neutral eigenmodes KW magnetic eddy diffusivity KW scale separation. JO Russian Journal of Earth Sciences AU Чертовских, Р.А. AU Желиговский, В.А. PY 2023 IS 23 PB Геофизический центр Российской Академии Наук