Erick de la Barrera และผู้แต่งคนอื่นๆ. (2015) Structural implications for nectar secretion by nectaries of three columnar cacti. <i>Maejo International Journal of Science and Technology</i>, <i>9</i>(2), 156.Erick de la Barrera และผู้แต่งคนอื่นๆ. "Structural implications for nectar secretion by nectaries of three columnar cacti". Maejo International Journal of Science and Technology 9 (2015):156.Erick de la Barrera และผู้แต่งคนอื่นๆ. Structural implications for nectar secretion by nectaries of three columnar cacti. Maejo University:ม.ป.ท. 2015.