https://www-users.cs.umn.edu/~saad/itermethbook_2nded.pdf – Google 검색

https://www.google.co.kr/search?safe=active&sxsrf=ALeKk00raqOtiO-bon04fntKyzqWHS_5Sw%3A1592312896277&source=hp&ei=QMToXoXdDpOHoASr2qvwCQ&q=https%3A%2F%2Fwww-users.cs.umn.edu%2F%7Esaad%2Fitermethbook_2nded.pdf&oq=&gs_lcp=ChFtb2JpbGUtZ3dzLXdpei1ocBABGAAyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECdQAFgAYJsZaAFwAHgAgAEAiAEAkgEAmAEAsAEP&sclient=mobile-gws-wiz-hp

http://www.ms.uky.edu/~qye/nagroup/pingzhangthesis.pdf – Google 검색

https://www.google.co.kr/search?safe=active&sxsrf=ALeKk03FnrpuC7F11b3kv58xULcKxnp0-g%3A1592311398801&source=hp&ei=Zr7oXuPKLomNoATunIOADQ&q=http%3A%2F%2Fwww.ms.uky.edu%2F%7Eqye%2Fnagroup%2Fpingzhangthesis.pdf&oq=&gs_lcp=ChFtb2JpbGUtZ3dzLXdpei1ocBABGAAyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECcyBwgjEOoCECdQAFgAYN0YaAFwAHgAgAEAiAEAkgEAmAEAsAEP&sclient=mobile-gws-wiz-hp