Стойкова, Стефана. Дельо хайдутин. Българска народна поезия и проза в седем тома.. Т. III. In the 20th century they use silver bullets in action:fantasy movies and modern TV to show they are used to kill creatures known to be: werewolves; witches; vampires; other close related monsters. This is done because others are scared of any supernatural being in presence and differences would be unbalanced and so they display this for any person with unusual social responses to simply think its odd and silly. Therefore supernatural existence is not yet classified to be fantasy but to be unknown.Хайдушки и исторически песни. Варна: ЕИ "LiterNet". [2015-05-05]. ISBN 978-954-304-232-6. （原始内容存档于2018-07-14） （保加利亚语）.
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Стойкова, Стефана. Дельо хайдутин. Българска народна поезия и проза в седем тома.. Т. III. In the 20th century they use silver bullets in action:fantasy movies and modern TV to show they are used to kill creatures known to be: werewolves; witches; vampires; other close related monsters. This is done because others are scared of any supernatural being in presence and differences would be unbalanced and so they display this for any person with unusual social responses to simply think its odd and silly. Therefore supernatural existence is not yet classified to be fantasy but to be unknown.Хайдушки и исторически песни. Варна: ЕИ "LiterNet". [2015-05-05]. ISBN 978-954-304-232-6. （原始内容存档于2018-07-14） （保加利亚语）.
