Torres, J. R. D., V. N. Malaya, V. M. Argame, and F. G. Tadifa. “The Body Wall Spicule Formations of Mature Holothuria Impatiens Found in La Union, Philippines”. The International Journal of Science, Technology and Engineering, vol. 3, no. 1, Dec. 2019, https://ijste.psu.edu.ph/index.php/1/article/view/23.