Academic journals primarily contain peer-reviewed scholarly articles, which also appear in article databases.
In A-Z Databases, select the subject "Southeast Asian Studies" and the database type "Articles".
Google Scholar is freely accessible and indexes scholarly literature in many formats and disciplines.
Bibliography of Asian Studies (BAS) has over 500,000 citations to journal articles, books, and conference proceedings worldwide on the countries, histories, and cultures of East, South, and Southeast Asia. [1971-present]
JSTOR provides full-text access to over 1000 scholarly journals, including more than 2 million articles, from a wide range of disciplines. Current issues from journals (the most recent 3-5 years) are generally not available in JSTOR. [dates vary]