Pietri-Tonelli, P. de, de Biondi, G., & Barontini, A. 1961 Control experiments against some species of citrus scales.. Contributi (Istituto di ricerche agrarie) 5: 21-46.

Notes: Field trials of chemical control of Chrysomphalus dictyospermi, Mytilococcus beckii and Pseudococcus citri in citrus orchards in Sicily.