Библиографическая ссылка:
Гафаров Е.Р., Лазарев А.А. A special case of the single-machine total tardiness problem is NP-hard / Journal of Computer and Systems Sciences International. М.: Published in Russian in Izvestiya Akademii Nauk. Teoriya i Sistemy Upravleniya, 2006. 45, No.3. С. 450-458.