Open-air space |
| Happ, J. & Elsler, A. 2014. |
| “The oldest Austrian songbird from the Central Miocene of Carinthia”. In Dojen, C. & Gebhardt, H. (eds.): Austrian Palaeontological Society – 20th Anniversary in Wolfsberg. Reports of the Geologische Bundesanstalt 105 |
HAPP, Helga (2013): “The Reptiles of Schütt”.
“Nature & People in the Schütt. The rock fall landscape in the nature park between Dobratsch and Gail.” Natural Science Association of Carinthia, Klagenfurt, 199–203. |
| KLEEWEIN, Andreas; HAPP, Helga; WIESER, Christian (2012) |
| “The dissemination of the Praying Mantis religiosa (Linnaeus, 1758) in Carinthia – Current standing on the establishment of a warming species.”
Carinthia II, 202nd volume, Natural Science Association of Carinthia, Klagenfurt, 81–90. |
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| GUTLEB, B.; HAPP, H.; EISANK, M., (2011) |
| “Amphibians and reptiles of Carinthia”. Natural Science Association of Carinthia, Klagenfurt, 97–184. |
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HAPP, Helga (2011)
| “The Wörthersee. Nature and history”. Natural Science Association for Carinthia, Klagenfurt, 257–263. |
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| HAPP, Helga, WIESER Daniela (2008) |
| “The hornotter Vipera ammodytes” (LINNAEUS, 1758) – in Carinthia is threatened with extinction! Is help still possible?” Carinthia II, volume 198.118, 83–94, Klagenfurt 2008 |
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| HAPP, Helga (2008): “Reptiles in the Millstättersee”; |
| “The Millstättersee. Nature and history”. Natural Science Association of Carinthia, Klagenfurt, 191–197. |
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| HAPP, Helga; MILDNER, Paul (2006) |
| “Observations on Carinthia’s amphibians”. Rudolfinum, annual publication of the Carinthian Provincial Museum, 2006 |
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| HAPP, Helga (2006): |
| “The Reptiles of the Sattnitzzug”. “The Sattnitz. A nature guide”. Natural Science Association of Carinthia, Klagenfurt, 289–299. |
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| WIESER, Daniela; HAPP, Helga; KOMPOSCH, Brigitte (2005) |
| “Horn viper & CO. – Danger or endangered?”. Schlossberg Griffen Fortress of Biodiversity. Natural Science Association of Carinthia, Klagenfurt, 85–91. |
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| HAPP, Helga (2004) |
| “Zoological features of the hot summer of 2003”. Carinthia II, Volume 194/114., 191–208, Klagenfurt |
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| HAPP, Helga; WIESER, Christian (2003) |
| “The 2003 Suspension of the snake breeding in the Reptilienzoo Happ.” – Carinthian nature conservation reports 8/2003 |
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| HAPP, Helga, MILDNER, Paul (2003) |
| “Georg Veith – herpetologist, antiquarian researcher and soldier.” Rudolfinum, yearbook of the Carinthian Provincial Museum, 2003 |
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| HAPP, Helga; MILDNER, Paul (2002) |
| “Double-headed reptiles from Carinthia”. Rudolfinum, yearbook of the Carinthian Provincial Museum, 2003 |
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| HAPP, Helga (2002) |
| “Last days of the horn otter (Vipera ammodytes) in Carinthia?” ÖGH – Aktuell, Nr. 10, November 2002 |
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GUTLEB, Bernhard; HAPP, Helga (2002)
“Turtles in Carinthia”. Carinthia II, Volume 192/112. Jahrgang, 155–160, Klagenfurt
| HAPP, Helga (2001) |
| “News from the reptile world; Flooding at the Wörthersee – Rescue of the endangered dice snake (Natrix tessellata)” Carinthia II, Volume 191/111, 37–42, Klagenfurt |
| HAPP, Helga, HAPP, Friedrich (1999) |
| “Last days of the horn otter (Vipera ammodytes) in Carinthia?” ÖGH – Aktuell, Nr. 10, November 2002 |
| HAPP, Helga, HAPP, Friedrich (1997) |
| “Dornfingerspinnen (Cheiracanthium punctorium) Poisonous bites in Carinthia and their potential confusion with viper bites (Vipera berus)” Carinthia II, Volume 187/107. 13–20, Klagenfurt |
| HAPP, Friedrich (1994)
“Found an albino snake (Coronella austriaca austriaca LAURENTI, 1768) on the Magdalensberg in Carinthia”. Carinthia II, Volume 184/104. 123–129, Klagenfurt
| HAPP, Helga (1995) |
| “’Man – snake’ – encounters of a special kind”. Carinthia II, Volume 185/105. 101–125, Klagenfurt. |
| CABELA, A.; GRILLITSCH, H.; HAPP, H.; HAPP, F.; KOLLAR, R. (1992) |
| “The reptiles of Carinthia”. Carinthia II, Volume 182/102. 195–316, Klagenfurt |
| HAPP, Friedrich (1985) |
| “Coronella austriaca austriaca a mimicry snake? An experience report on the special position of the Coronella austriaca austriaca among the Carinthian snakes” Carinthia II, Volume 175/95. 285–290, Klagenfurt |
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