http://www.orlickehory.eu/index.php?option=com_content&view=article&id=1030&Itemid=275&lang=cs
http://www.orlickehory.eu/index.php?option=com_content&view=article&id=1029&Itemid=274&lang=cs
http://www.novomestskonadmetuji.cz/index.php?option=com_content&view=article&id=48&Itemid=70