Muon spin rotation study of the magnetic structure in the tetragonal antiferromagnetic state of weakly underdoped Ba1−xKxFe2As2B. P. P. Mallett, Yu. G. Pashkevich, A. Gusev, Th. Wolf and C. BernhardEPL, 111 5 (2015) 57001DOI: https://doi.org/10.1209/0295-5075/111/57001