- american geophysical union (agu)8
- wiley-blackwell8
- american society for microbiology5
- caaul, lisbon, portugal.5
- cab, madrid, spain.5
- cab, madrid, spain.;inta, aguilas, spain.5
- caltech, pasadena, ca 91125 usa.5
- cardiff univ, cardiff cf10 3ax, s glam, wales.5
- caup, oporto, portugal.5