Kongsamai, B., Junjerm, J. . and Promdang, S. (2010) “Seed Alpha-tocopherol and oil Content in Sunflower (Helianthus annuus L.) Inbreds, Open-pollinated Varieties and Commercial Hybrids  ”, Thai Agricultural Research Journal, 28(3), p. 317. doi: 10.14456/thaidoa-agres.2010.19.