@article {dum3519,
	title = {Selaginella kraussiana overwinterend in een gazon in Belsele (Sint-Niklaas)},
	journal = {Dumortiera},
	volume = {98},
	year = {2010},
	pages = {22-24},
	chapter = {22},
	author = {Willy VAN ROMPU}
}
@article {dum3516,
	title = {Adventieve tropische varens in een kweekserre: industrieel fijn stof als een mogelijke dispersievector},
	journal = {Dumortiera},
	volume = {96},
	year = {1996},
	month = {8/2009},
	pages = {23-26},
	chapter = {23},
	abstract = {Casual tropical ferns in a glasshouse:
industrial dust as a potential dispersal agent. In 2005-2006, five exotic fern species (three of them not identified yet) new to Belgium and possibly to (continental) Europe, were discovered in a tomato glasshouse in Wachtebeke. These records clearly differ from other casual finds of exotic ferns, as they concern wild species, not escapes from cultivation. It seems plausible that spores have initially been introduced with ore and that afterwards the wind enabled spores to reach a glasshouse some three kilometres away from where the ore were stocked.},
	author = {William White}
}
@article {dum3508,
	title = {Botrychium simplex te Knokke?},
	journal = {Dumortiera},
	volume = {50},
	year = {1992},
	pages = {1-4},
	chapter = {1},
	author = {Leten, M.}
}
@article {dum3384,
	title = {Exotische muurvarens in Belgi{\"e} en Nederland},
	journal = {Dumortiera},
	volume = {92},
	year = {2007},
	pages = {1-16},
	chapter = {1},
	abstract = {Exotic mural ferns in Belgium and the Netherlands. In recent years an increasing number of exotic mural ferns have been recorded in urban areas of Belgium and the Netherlands. Without exception, these plants have escaped from cultivated individuals of which tender taxa bave profited by microclimate and environmental conditions present in larger cities ({\textquoteright}heat islands{\textquoteright}). The present paper deals with recent records of Adiantum capillus-veneris, A. diaphanum and A. raddianum, Cyrtominm falcatum and C, fortunei, Dryopteris cycadina, Polystichum tsus-simense, Pteris cretica s.l. and P. multiflda. Most of these taxa are (very) frost-sensitive and their appearance may be temporary (Cyrtomium falcatum in the Netherlands excepted). Identification keys, photographs, original line drawings and herbarium scans are presented here for most of the escaped species to facilitate identification. In addition, distributional records and ecological comments are provided and reasons why the sudden increase in occurrence of exotic ferns in urban areas discussed.},
	author = {Filip Verloove and Raymond van de Ham and Ton Denters}
}
