N. K. B.  Robson, ?(971) Proposal to conserve the name Hypericum japonicum Thunb. ex Murray against H. chinense Osbeck (Guttiferae).?, Taxon, vol. 39, pp. 134-135 (1990) -, 1990.

N. K. B.  Robson, ?(972) Proposal to reject the name Hypericum quadrangulum L. (Guttiferae).?, Taxon, vol. 1, pp. 135-137 (1990) -, 1990.

N. K. B.  Robson, ?(1573) Proposal to conserve the name Hypericum xdesetangsii Lamotte (Clusiaceae) with a conserved type.?, Taxon, vol. 52, pp. 139-140 (2003) -, 2003.