Fadhila Dhuha Oktiana, Budi Santoso, and Rahmi Sulistyarini. “The Meaning and Limitations of the Phrases “Valid” and ‘Appropriate’ in Electronic Summons from the Perspec-Tive of the Principle of Legal Certainty”. Journal of Science and Education (JSE), vol. 6, no. 2, Jan. 2026, pp. 1374-80, doi:10.58905/jse.v6i2.734.