D.  Ertz and Van den Boom, P. P. G., ?Lecanographa atlantica (Arthoniales, Lecanographaceae), a widespread and conspicuous but still undescribed lichen-forming fungus?, Phytotaxa, vol. 472, pp. 147-158, 2020.

P. P. G.  Van den Boom, Brand, A. M., Coppins, B. J., and Sérusiaux, E., ?Two new species in the Micarea prasina group from Western Europe?, Lichenologist, vol. 49, pp. 13-25, 2017.

P. P. G.  Van den Boom and Brand, A. M., ?Lecania fructigena Zahlbr., a coastal saxicolous lichen new for Europe, with notes on related species?, Lichenologist, vol. 37, pp. 277-283, 2005.

M.  Brand, Coppins, B. J., Van den Boom, P. P. G., and Sérusiaux, E., ?Further data on the lichen genus Bacidia s.l. in the Canary Islands and Western Europe, with descriptions of two new species?, Bibliotheca Lichenologica, vol. 99, pp. 81-92, 2009.

M.  Giralt and Van den Boom, P. P. G., ?The genus Buellia s.l. and some additional genera of Physciaceae in the Canary Islands?, Nova Hedwigia, vol. 92, pp. 29-55, 2011.

P.  Diederich, Lawrey, J. D., Sikaroodi, M., Van den Boom, P. P. G., and Ertz, D., ?Briancoppinsia, a new coelomycetous genus of Arthoniaceae (Arthoniales) for the lichenicolous Phoma cytospora, with a key to this and similar taxa?, Fungal Diversity, vol. 52, pp. 1-12, 2012.

M.  Giralt, Van den Boom, P. P. G., and Matzer, M., ?The genus Rinodina in the Netherlands, Belgium and Luxemburg?, Mycotaxon, vol. 61, pp. 103-151, 1997.

P. P. G.  Van den Boom and Vezda, A., ?A new species and a new variety of the lichen genus Gyalidea from western Europe?, Mycotaxon, vol. 54, pp. 421-426, 1995.

P. P. G.  Van den Boom, ?The saxicolous species of the lichen genus Lecania in the Netherlands, Belgium and Luxemburg?, Nova Hedwigia, vol. 54, pp. 229-254, 1992.

P. P. G.  Van den Boom and Etayo, J., ?New records of lichenicolous fungi and lichenicolous lichens from the Iberian Peninsula, with the description of four new species and one new genus?, Opuscula Philolichenum, vol. 13, pp. 44-79, 2014.

P.  Diederich, Ertz, D., Eichler, M., Cezanne, R., Van den Boom, P. P. G., Fischer, E., Killmann, D., van den Broeck, D., and Sérusiaux, E., ?New or interesting lichens and lichenicolous fungi from Belgium, Luxembourg and northern France. XIV?, Bulletin de la Société des naturalistes luxembourgeois, vol. 113, pp. 95-115, 2012.

E.  Sérusiaux, Van den Boom, P. P. G., Brand, M. A., Coppins, B. J., and Magain, N., ?Lecania falcata, a new species from Spain, the Canary Islands and the Azores, close to Lecania chlorotiza?, Lichenologist, vol. 44, pp. 577-590, 2012.

P. P. G.  Van den Boom, ?New Halecania species (Catillariaceae) from Europe and South America?, Bryologist, vol. 112, pp. 827-832, 2009.

P.  Diederich, Van den Boom, P. P. G., and Aptroot, A., ?Cladoniicola staurospora gen. et sp. nov., a new lichenicolous coelomycete from western Europe?, Belgian Journal of Botany, vol. 134, pp. 127-130, 2001.

J.  Kocourková and Van den Boom, P. P. G., ?Lichenicolous fungi from the Czech Republic II. Arthrorhaphis arctoparmeliae spec. nov. and some new records for the country?, Herzogia, vol. 18, pp. 23-35, 2005.