Several of the readings came from the lecture notes on Intensional Semantics:
[Intensional Semantics] = von Fintel, Kai, and Irene Heim. Lecture notes. "Intensional Semantics." http://kaivonfintel.org/teaching/. (PDF)
Interspersed between these chapters were papers, presentations, and working papers. The readings were covered approximately in the order listed.
"Beginnings of Intensional Semantics." Chapter 1 in [Intensional Semantics].
See the summary tables on p. 128. The entire thesis is also worth a look:
Nauze, Fabrice. "Modality in Typological Perspective." PhD diss., Universiteit van Amsterdam, 2008. (PDF - 1.9MB)
"Propositional Attitudes." Chapter 2 in [Intensional Semantics].
"Modality." Chapter 3 in [Intensional Semantics].
"Conditionals." Chapter 4 in [Intensional Semantics].
Kusumoto, Kiyomi. "Issues in Tense Semantics." Chapter 1 in "Tense in Embedded Contexts." PhD diss., University of Massachusetts, Amherst, 1999.
Portner, Paul. "The Progressive in Modal Semantics." Language 74, no. 4 (December 1998): 760-787.
Kusumoto, Kyomi. "On the Quantification over Times in Natural Language." Natural Language Semantics 13, no. 4 (December 2005): 317-357.
Iatridou, Sabine, Elean Anagnostopoulou, and Roumyana Izvorski. "Observations about the Form and Meaning of the Perfect." In Perfect Explorations. Edited by Artemis Alexiadou, Monika Rathert, and Arnim von Stechow. New York, NY: Walter de Gruyter, pp. 153-204. ISBN: 9783110172294. [Preview in Google Books]
von Fintel, Kai, and Sabine Iatridou. "Since Since." Working paper, Massachusetts Institute of Technology, March 2005. (PDF)
"DPs (Determiner Phrases) and Scope in Modal Contexts." Chapter 7 in [Intensional Semantics].
"Beyond de re—de dicto: The Third Reading." Chapter 8 in [Intensional Semantics].
Percus, Orin. "Constraints on Some Other Variables in Syntax." Natural Language Semantics 8, no. 3 (September 2000): 173-229.
Schwager, Magdalena. "Speaking of Qualities." Paper presentation, Semantics and Linguistic Theory (SALT) 19 Conference, Ohio State University, Columbus, OH, April 3-5, 2009. Slides (PDF - 1.0MB) (Courtesy of J. Magdalena Schwager. Used with permission.) Paper (PDF) (Courtesy of J. Magdalena Schwager. Used with permission.)
Keshet, Ezra. "Split Intensionality: A New Scope Theory of De re and De dicto." Working paper, University of Michigan, Ann Arbor, May 2009.