I cannot access the article online through my institution as our subscription only starts with the volumes of 1995.
On a related note, when reading about the details of Kāṭayavema's life, I have found references to his "introductory verses" on the Śākuntala (
here), but in the edition I have, ed. by C. Sankara Rama Sastri (
here), there is only a single verse. Are there more verses in other editions? I still need to have a look at MS catalogs where more verses might be recorded, but if there is another edition containing the mentioned verses, that would be helpful.