by 김태우(Tae Woo Kim), 김경곤(Kyoung Kon Kim), 강윤환(Yun Hwan Kang), 김대중(Dae Jung Kim), 이정일(Jeong Il Lee), 최면(Myeon Choe)
Published in 한국식품과학회지 (2015)

by 조문수(Moon Soo Cho), 구본순(Bon Soon Ku), 이정일(Jeong Il Lee)
Published in Weon'ye gwahag gi'sulji (2010)

by 구본순(Bon-Soon Ku), 조문수(Moon-Soo Cho), 이정일(Jeong-Il Lee), 양현모(Hun-Mo Yang), 김주형(Ju-Hyoung Kim), 이희두(Hee-Doo Lee), 이조원(Jo-Won Lee)
Published in Weon'ye gwahag gi'sulji (2012)

by 이정일(Jeong Il Lee), 이성은(Sung Eun Lee)
Published in 한국화재소방학회 논문지 (30.12.2019)

by 임병승(Byung-Seung Yim), 윤희준(Hee Jun Youn), 이정일(Jeong Il Lee), 김종민(Jong-Min Kim)
Published in 대한용접·접합학회지 (01.04.2020)

by 구본순(Bon-Soon Ku), 조문수(Moon-Soo Cho), 이정일(Jeong-Il Lee), 양현모(Hun-Mo Yang), 정하정(Ha-Jeong Jeong), 이희두(Hee-Doo Lee), 김주형(Ju-Hyoung Kim)
Published in Weon'ye gwahag gi'sulji (2010)

by 임병승(Byung-Seung Yim), 이정일(Jeong Il Lee), 김종민(Jong-Min Kim)
Published in 대한용접·접합학회지 (01.02.2019)

by 임병승(Byung-Seung Yim), 이정일(Jeong Il Lee), 김종민(Jong-Min Kim)
Published in Journal of welding and joining (2017)

by 김경곤(Kyoung Kon Kim), 강윤환(Yun Hwan Kang), 김대중(Dae Jung Kim), 김태우(Tae Woo Kim), 이정일(Jeong Il Lee), 최면(Myeon Choe)
Published in 東아시아食生活學會誌 (2014)

by 이정일(Jeong Il Lee), 박성흠(Seong-Heum Park), 최경우(Kyeung Woo Choi)
Published in Annals of surgical treatment and research (1997)

by 장문수(Moon-Soo Chang), 이정일(Jeong-Il Lee), 오창석(Chang-Suk Oh)
Published in 韓國컴퓨터情報學會論文誌 (2009)

by 원용재(Yong-Jae Won), 전용희(Yong-Hee Jeon), 정국현(Kuk-Hyun Jung), 신영섭(Young-Seop Shin), 김연규(Yeon-Gyu Kim), 최임수(Im-Soo Choi), 한희석(Hee-Seog Han), 오명규(Myung-Kyu Oh), 이상복(Sang-Bok Lee), 이정일(Jeong-Il Lee), 조영찬(Young-Chan Cho), 최용환(Yong-Hwan Choi), 노재환(Jae-Hwan Roh), 안억근(Eok-Keun Ahn), 윤영환(Young-Hwan Yoon)
Published in Korean journal of breeding (30.12.2011)

by 이정희(Jeong-Heui Lee), 신영섭(Shin Young-Seop), 정오영(O-Young Jeong), 김명기(Myeong-Ki Kim), 김연규(Yeon-Gyu Kim), 김홍열(Hong-Yeol Kim), 이점호(Jeom-Ho Lee), 이정일(Jeong-Il Lee), 조영찬(Young-Chan Cho), 전용희(Yong-Hee Jeon), 최용환(Yong-Hwan Choi), 양창인(Chang-Ihn Yang), 홍하철(Ha-Cheol Hong), 원용재(Yong-Jae Won), 신진철(Jin-Chul Shin), 김형윤(Hyung-Yoon Kim), 서대하(Dae-Ha Seo), 황흥구, 예종두
Published in Korean journal of breeding (30.12.2010)

by 조영찬(Young-Chan Cho), 오명규(Myung-Kyu Oh), 최임수(Im-Soo Choi), 김연규(Yeon-Gyu Kim), 김명기(Myeong-Ki Kim), 황흥구(Hung-Goo Hwang), 홍하철(Ha-Cheol Hong), 정오영(O-Young Jeong), 최인배(In-Bae Choi), 최용환(Yong-Hwan Choi), 전용희(Yong-Hee Jeon), 이점호(Jeom-Ho Lee), 이정희(Jeong-Heui Lee), 이정일(Jeong-Il Lee), 신영섭(Young-Seop Shin), 김정주(Jeong-Ju Kim), 김기종(Ki-Jong Kim), 백만기(Man-Kee Baek), 노재환
Published in Korean journal of breeding (30.12.2009)

by Lee, Jeong-il
Published in International journal of Korean history (2020)

by Kwon Nae-hyun(Kw?n Naehy?n), Joseph Jeong-il Lee(이정일)
Published in International journal of Korean history (2012)

by 李廷日(Jeong-Il Lee), 徐將守(Jang-Soo Seo), 姜秉福(Byung-Bog Kang), 車仁洙(In-Su Cha)
Published in 전기학회논문지 P (2002)