diff --git a/Syntax/§31.1.md b/Syntax/§31.1.md
index 3bbab9af..ba764067 100644
--- a/Syntax/§31.1.md
+++ b/Syntax/§31.1.md
@@ -25,13 +25,22 @@ Lane C. McGaughy, _Toward a Descriptive Analysis of ’Einai as a Linking Verb i
---
-但 Goethius (1976) 認為這些其實不是例外,從以下幾節可以看出:(Goetchius, E. V. N. “Review of Toward a Descriptive Analysis of Einai as a Linking Verb in New Testament Greek.” _Journal of Biblical Literature_ 95.1 (1976): 147–49.)
+但 Goethius (1976) 認為這些其實不是例外,從以下幾節可以看出:
+
+Goetchius, E. V. N. "Review of Toward a Descriptive Analysis of Einai as a Linking Verb in New Testament Greek." _Journal of Biblical Literature_ 95.1 (1976): 147–49, , http://dx.doi
+.org/10.2307/3265495.
- Ὡς δὲ κατῆλθον ἀπὸ τῆς Μακεδονίας ὅ τε Σιλᾶς καὶ ὁ Τιμόθεος, συνείχετο τῷ λόγῳ ὁ Παῦλος διαμαρτυρόμενος τοῖς Ἰουδαίοις εἶναι τὸν Χριστὸν Ἰησοῦν.
- εὐτόνως γὰρ τοῖς Ἰουδαίοις διακατηλέγχετο δημοσίᾳ ἐπιδεικνὺς διὰ τῶν γραφῶν εἶναι τὸν Χριστὸν Ἰησοῦν. ¶
- πᾶσάν τε ἡμέραν ἐν τῷ ἱερῷ καὶ κατ᾽ οἶκον οὐκ ἐπαύοντο διδάσκοντες καὶ εὐαγγελιζόμενοι τὸν Χριστὸν Ἰησοῦν. ¶
+---
+D. A. Carson, "The Purpose of the Fourth Gospel: John 20:31 Reconsidered," *JBL* 106 (1987): 639–51, http://dx.doi.org/10.2307/3260824.
+
+---
+
+Matthew D. Jensen, “John Is No Exception: Identifying the Subject of Εἰμί and Its Implications,” _Journal of Biblical Literature_.2 (2021): 15.
---