Achatz, J. G., Chiodin, M., Salvenmoser, W., Tyler, S., & Martinez, P. (2012). The Acoela: On their kind and kinships, especially with nemertodermatids and xenoturbellids (Bilateria incertae sedis). Springer-Verlag.

Achatz, Johannes G., Marta Chiodin, Willi Salvenmoser, Seth Tyler, and Pedro Martinez. The Acoela: On Their Kind and Kinships, Especially With Nemertodermatids and Xenoturbellids (Bilateria Incertae Sedis). Springer-Verlag, 2012.

Achatz, Johannes G., et al. The Acoela: On Their Kind and Kinships, Especially With Nemertodermatids and Xenoturbellids (Bilateria Incertae Sedis). Springer-Verlag, 2012.