EL ACUERDO INTERINSTITUCIONAL EN LA PRÁCTICA PERUANA DE DERECHO INTERNACIONAL: REEXAMEN DE “THE CONCEPT OF TREATY IN INTERNATIONAL LAW” DE KLABBERS: THE INTERINSTITUTIONAL AGREEMENT IN THE PERUVIAN PRACTICE OF INTERNATIONAL LAW: REEXAMINATION OF “THE CONCEPT OF TREATY IN INTERNATIONAL LAW” OF KLABBERS. RID 2023, 3 (1).