https://catsbi.oopy.io/fffa6930-ca30-4f7e-88b6-28011fde5867https://hanamon.kr/javascript-this%EB%9E%80-%EB%AC%B4%EC%97%87%EC%9D%BC%EA%B9%8C/
https://www.daleseo.com/css-em-rem/
https://yozm.wishket.com/magazine/detail/746/
https://bite-sized-learning.tistory.com/177
https://gaussian37.github.io/math-pb-gamma_and_exponential_distribution/
모듈 활용https://hezzong.tistory.com/entry/python-from-import-as-%EC%82%AC%EC%9A%A9%EB%B2%95
쟈코비안https://suhak.tistory.com/944