Evaluation of MALDI-TOF mass spectrometry for the competitiveness analysis of selected indigenous cowpea (Vigna unguiculata L. Walp.) Bradyrhizobium strains from Kenya. - Frossard, Emmanuel; Ndungu, Samuel Mathu; Messmer, Monika M.; Thonar, Cécile; Thuita, Moses; Vanlauwe, Bernard; Ziegler, Dominik (Applied Microbiology & Biotechnology, 2018)