Operator theory and function theory:

    M. A. Dritschel and J. Rovnyak,
    The operator Fejér-Riesz theorem,
    A Glimpse at Hilbert Space Operators. Paul R. Halmos in Memorium, Oper. Theory Adv. Appl. 207 (2010), 223-254.

    J. M. Anderson, M. A. Dritschel, and J. Rovnyak,
    Schwarz-Pick inequalities for the Schur-Agler class on the polydisk and unit ball,
    preprint, 2007.

    J. M. Anderson and J. Rovnyak,
    On generalized Schwarz-Pick estimates,
    Mathematika 53 (2006), 161-168.

    Operator identities and canonical differential systems:

    J. Rovnyak and L. A. Sakhnovich,
    Integral representations for generalized difference kernels having a finite number of negative squares,
    Integral Equations Operator Theory, 63 (2009), no. 2, 281--296.

    J. Rovnyak and L. A. Sakhnovich,
    Interpolation problems for matrix integro-differential operators with difference kernels and with a finite number of negative squares,
    Operator Theory, Structured Matrices, and Dilations: Tiberiu Constantinescu Memorial Volume, Theta Foundation, Bucharest, 2007, 325--340.

    J. Rovnyak and L. A. Sakhnovich,
    Inverse problems for canonical differential equations with singularities,
    Oper. Theory Adv. Appl. 179 (2007), 257--288.

    J. Rovnyak and L. A. Sakhnovich,
    On indefinite cases of operator identities which arise in interpolation theory,
    Oper. Theory Adv. Appl. 171 (2006), 281-322.

    J. Rovnyak and L. A. Sakhnovich,
    On the Krein-Langer integral representation of generalized Nevanlinna functions,
    Electronic Journal of Linear Algebra 11 (2004), 1-15.

    Loewner interpolation and related topics:

    D. Alpay, T. Constantinescu, A. Dijksma, and J. Rovnyak,
    Notes on interpolation in the generalized Schur class. II. Nudel'man's problem,
    Trans. Amer. Math. Soc. 355 (2003), no. 2, 813-836.

    D. Alpay, V. Bolotnikov, A. Dijksma, and J. Rovnyak,
    Some extensions of Loewner's theory of monotone operator functions,
    J. Funct. Anal. (2002), no. 1, 1--20.

    D. Alpay and J. Rovnyak,
    Loewner's theorem for kernels having a finite number of negative squares,
    Proc. Amer. Math. Soc. 127 (1999), no. 4, 1109--1117.

    Krein space operator theory:

    D. Z. Arov, J. Rovnyak, and M. Saprikin,
    Linear passive stationary scattering systems with Pontryagin state spaces,
    Math. Nachr. {279} (2006), no. 13--14, 1396--1424.

    J. Rovnyak,
    Methods of Krein space operator theory,
    Theory Adv. Appl., vol. 134, Birkhauser, Basel, 2002, pp. 31-66.

    M. A. Dritschel and J. Rovnyak,
    Operators on indefinite inner product spaces,
    Lectures on operator theory and its applications, (Waterloo, ON 1994), Fields Inst. Monogr., vol. 3, Amer. Math. Soc., Providence, RI, 1996, pp. 141-232.

    M. A. Dritschel and J. Rovnyak,
    Extension theorems for contraction operators on Krein spaces,
    Oper. Theory Adv. Appl., vol. 47, Birkhauser Verlag, Basel, 1990, pp. 221-305.

    Canonical models:

    L. de Branges and J. Rovnyak,
    Canonical models in quantum scattering theory,
    Perturbation Theory and its Applications in Quantum Mechanics, Wiley, 1966, pp. 295-392.

    J. Rovnyak,
    Characterization of spaces H(M),
    Unpublished paper, 1968.

    Odds and ends:

    J. Rovnyak,
    An extension problem for the coefficients of Riemann mappings,
    Seminar lecture, November 1991. The lecture fleshes out the details of a theorem of de Branges on a characterization of the Taylor coefficients of a univalent function.

    R. B. Leech,
    Factorization of analytic functions and operator inequalities,
    Unpublished paper, with comments and additional references.