출처: http://www.busan.com/view/busan/view.php?code=2020081719083674067
출처: http://www.busan.com/view/busan/view.php?code=2020082319020216727&fbclid=IwAR2NdKHY7VEAPsn_-7UFfYko5UqumDS2N5tcy3XonmyLgiWFB2v669UH7Cc
출처 : http://basw.or.kr/notice/165604
출처: https://www.youtube.com/watch?v=DcwRLtHYoCg&t=109s