Palais; James B.Views on Korean social history (англ.). — Institute for Modern Korean Studies, Yonsei University, 1998. — P. 50. — ISBN 9788971414415.. — «Another target of his critique is the insistence that slaves (nobi) in Korea, especially in Choson dynasty, were closer to serfs (nongno) than true slaves (noye) in Europe and America, enjoying more freedom and independence than what a slave would normally be allowed.».
«…before the introduction of modern medicine in the early 1900s the average life expectancy for Koreans was just 24 for males and 26 for females.» Lankov, Andrei[англ.]; Kim EunHaeng.The Dawn of Modern Korea (неопр.). — 384-12 Seokyo-dong, Mapo-gu, Seoul, South Korea, 121-893: EunHaeng Namu, 2007. — С. 47. — ISBN 978-89-5660-214-1. Архивировано 1 ноября 2020 года.
«…before the introduction of modern medicine in the early 1900s the average life expectancy for Koreans was just 24 for males and 26 for females.» Lankov, Andrei[англ.]; Kim EunHaeng.The Dawn of Modern Korea (неопр.). — 384-12 Seokyo-dong, Mapo-gu, Seoul, South Korea, 121-893: EunHaeng Namu, 2007. — С. 47. — ISBN 978-89-5660-214-1. Архивировано 1 ноября 2020 года.
«…before the introduction of modern medicine in the early 1900s the average life expectancy for Koreans was just 24 for males and 26 for females.» Lankov, Andrei[англ.]; Kim EunHaeng.The Dawn of Modern Korea (неопр.). — 384-12 Seokyo-dong, Mapo-gu, Seoul, South Korea, 121-893: EunHaeng Namu, 2007. — С. 47. — ISBN 978-89-5660-214-1. Архивировано 1 ноября 2020 года.