Vu, N. H.; Nghia, T. T.; Hien, P. B.; Son, P. X.; Son, T. C.; San, N. T.; Minh, N. V.; Khang, N. T. Difficulties and Challenges Met by Vietsovpetro While Transporting Paraffinic Oil by Offshore Subsea Pipelines. PVJ 2015, 5, 20-25.