Complexes of biscitratogermanates and biscitratostanates with metals are modifiers of Bacillus thuringiensis var. israelensis peptidases and Penicillium canescens, ladosporium cladosporioides and Aspergillus niger α-galactosidases activities - L. D. Varbanets; N. A. Nidialkova; N. V. Borzova; I. I. Seifullina; E. E. Martsinko; E. A. Chebanenko (Biotechnologia Acta, 2016)