A.  Aptroot and Sipman, H. J. M., ?New Lichens and Lichen Records from New Guinea?, Willdenowia, vol. 20, pp. 221-256, 1991.

M. R. D.  Seaward, Aptroot, A., and Harrington, F. A., ?The Lichens of Aldabra, with Comments on Their Distribution?, The Bryologist, vol. 105, pp. 473-477, 2002.

A.  Aptroot, ?New and interesting lichens and lichenicolous fungi in Brazil?, Fungal Diversity, vol. 9, pp. 15-45, 2002.

A.  Aptroot, Sparrius, L. B., and Lai, M. - J., ?New Taiwan Macrolichens?, Mycotaxon, vol. 84, pp. 281-292, 2002.

M. R. D.  Seaward and Aptroot, A., ?Hong Kong Lichens Collected on the United States North Pacific Exploring Expedition, 1853-1856?, The Bryologist, vol. 108, pp. 282-286, 2005.

A.  Aptroot, ?Sticta alpinotropica, a new saxicolous lichen species from the alpine zone of Mt Wilhelm, Papua New Guinea?, The Lichenologist, vol. 40, pp. 419-422, 2008.