N. K. B.  Robson, ?Studies in the genus Hypericum L. (Guttiferae): 7. Section 29. Brathys (part 1).?, Bull. Brit. Mus. (Nat. Hist.) Bot., vol. 16, p. 106p. (1987) - illus., maps., 1987.

N. K. B.  Robson, ?An Iranian floristic link with Socotra in Hypericum (Hypericaceae).?, Pl. Syst. Evol., vol. 155, pp. 89-92 (1987) -, 1987.

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, ?Studies in the genus Hypericum L. (Guttiferae): 8. Sections 29. Brathys (part 2) and 30. Trigynobrathys.?, Bull. Brit. Mus. (Nat. Hist.) Bot., vol. 20, pp. 1-151 (1990) - illus., maps., 1990.

N. K. B.  Robson, ?Parallel evolution in tropical montane Hypericum.?, Op. Bot., vol. no.121, pp. 263-274 (1993) - illus., col.illus., 1993.

N. K. B.  Robson, ?Studies in Hypericum: validation of new names.?, Bull. Nat. Hist. Mus. (London), Bot., vol. 23, pp. 67-70 (1993) -, 1993.

N. K. B.  Robson, ?Hypericum uralum.?, New Plantsman, vol. 2, pp. 242-245 (1995) - col. illus., 1995.

N. K. B.  Robson, ?Studies in the genus Hypericum L. (Guttiferae) 4(2). Section 9. Hypericum sensu lato (part 2): subsection 1. Hypericum series 1. Hypericum.?, Bull. Nat. Hist. Mus. (London), Bot., vol. 32, pp. 61-123 (2002) - illus., 2002.

D.  Ciccarelli, Garbari, F., and Robson, N. K. B., ?Hypericum perforatum L. (Clusiaceae) in Italy: some taxonomic remarks.?, Atti Soc. Tosc. Sci. nat. Mem., B, vol. 109, pp. 1-4 (2002 publ. 2003) - illus., 2003.

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.

N. K. B.  Robson, ?Hypericum botany.?, in Hypericum: the genus Hypericum., E.  Ernst, Ed. London: Taylor and Francis, 2003, pp. pp.1-22 - illus.