Olabarria, C., Rossi, F., Rodil, I.F., Quintas, P. and Troncoso, J.S. 2009. Use of hierarchical designs to detect scales of heterogeneity in the invasive species Sargassum muticum. Scientia Marina. 73, 3 (Sep. 2009), 507–514. DOI:https://doi.org/10.3989/scimar.2009.73n3507.