Some more found by a quick grep for "et al.", "Proceedings", "Proc. ", "Symposium", "Conference", "Conf. ", "PPoPP" (a conference with an easy-to-grep-for name), and "acm.org":

hotspot/src/cpu/ppc/vm/ppc.ad: See J.M.Tendler et al. "Power4 system microarchitecture", IBM J. Res. & Dev., No. 1, Jan. 2002.

hotspot/src/cpu/x86/vm/crc32c.h: V. Gopal et al. / Fast CRC Computation for iSCSI Polynomial Using CRC32 Instruction April 2011 8

hotspot/src/share/vm/gc/shared/taskqueue.hpp: Le, N. M., Pop, A., Cohen A., and Nardell, F. Z.: Correct and efficient work-stealing for weak memory models Proceedings of the 18th ACM SIGPLAN symposium on Principles and practice of parallel programming (PPoPP 2013), 69-80

jdk/src/java.base/share/classes/java/util/Arrays.java: Peter McIlroy's "Optimistic Sorting and Information Theoretic Complexity", in Proceedings of the Fourth Annual ACM-SIAM Symposium on Discrete Algorithms, pp 467-474, January 1993

jdk/src/jdk.crypto.ec/share/native/libsunec/impl/mpmontg.c: "A Cryptogrpahic Library for the Motorola DSP56000" by Stephen R. Dusse' and Burton S. Kaliski Jr. published in "Advances in Cryptology: Proceedings of EUROCRYPT '90, LNCS volume 473, 1991, pg 230-244

hotspot/src/share/vm/opto/superword.hpp: "Exploiting SuperWord Level Parallelism with Multimedia Instruction Sets" by Samuel Larsen and Saman Amarasinghe [...] published in ACM SIGPLAN Notices, Proceedings of ACM PLDI '00, Volume 35 Issue 5

jdk/src/java.base/share/classes/java/util/SplittableRandom.java: Leiserson, Schardl, and Sukha "Deterministic Parallel Random-Number Generation for Dynamic-Multithreading Platforms", PPoPP 2012

jdk/src/java.base/share/classes/java/util/SplittableRandom.java: "Parallel random numbers: as easy as 1, 2, 3" by Salmon, Morae, Dror, and Shaw, SC 2011

jdk/src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java: "Dynamic Circular Work-Stealing Deque" by Chase and Lev, SPAA 2005

jdk/src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java: "Idempotent work stealing" by Michael, Saraswat, and Vechev, PPoPP 2009

jdk/src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java: "Leapfrogging: a portable technique for implementing efficient futures" by D.B. Wagner and B.G. Calder, PPoPP '93, http://dl.acm.org/citation.cfm?id=155354

jdk/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java: Using elimination to implement scalable and lock-free FIFO queues, Moir et al, http://portal.acm.org/citation.cfm?id=1074013

jdk/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java: "Bounding space usage of conservative garbage collectors", HJ Boehm, http://portal.acm.org/citation.cfm?doid=503272.503282 (this is the Boehm GC paper)

jdk/src/java.base/share/classes/java/util/concurrent/locks/StampedLock.java: Design, verification and applications of a new read-write lock algorithm, Shirako et al, SPAA 2012

hotspot/src/share/vm/opto/escape.hpp: Jong-Deok Shoi, Manish Gupta, Mauricio Seffano, Vugranam C. Sreedhar, Sam Midkiff: "Escape Analysis for Java", Procedings of ACM SIGPLAN OOPSLA Conference, November 1, 1999

hotspot/src/share/vm/runtime/os.cpp: Gilad Bracha and David Ungar: "Mirrors: Design Principles for Meta-level Facilities of Object-Oriented Programming Languages", in Proc. of the ACM Conf. on Object-Oriented Programming, Systems, Languages and Applications, October 2004

jdk/src/jdk.crypto.ec/share/native/libsunec/impl/ec_naf.c: D. Hankerson, J. Hernandez and A. Menezes, "Software implementation of elliptic curve cryptography over binary fields", Proc. CHES 2000

jdk/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java: "Nonblocking Concurrent Objects with Condition Synchronization", by W. N. Scherer III and M. L. Scott. 18th Annual Conf. on Distributed Computing, Oct. 2004