Operations Research - 1981 Campbell, S. L. (1981). Numerical procedures for analyzing nonlinear semi-state equations. Proceedings Fifth International Symposium on the Mathematical Theory of Networks and Systems, 22–27. Lamendola, C. N., & Fang, S. (1981). The Most Frequently Used Decreasing Algorithm for the 1.5-Dimensional Coil Slitting Problem (Technical Report No. CC7455). AT&T Engineering Research Center. Fang, S. (1981). Routing in a Network with Multi-Class Links (Technical Report No. CC7479). AT&T Engineering Research Center. Lamendola, C. N., & Fang, S. (1981). The Most Frequently Used Decreasing Algorithm for the 2-Dimensional Coil Slitting Problem (Technical Report No. CC7575). AT&T Engineering Research Center. Campbell, S. L., & Poole, G. D. (1981). Convergent regular splittings for nonnegative matrices. Linear and Multilinear Algebra, 10(1), 63–73. https://doi.org/10.1080/03081088108817393 Campbell, S. L., & Clark, K. (1981). Order and the index of singular time-invariant linar systems. Systems & Control Letters, 1(2), 119–122. https://doi.org/10.1016/s0167-6911(81)80048-5 Campbell, S. (1981). A procedure for analyzing a class of nonlinear semistate equations that arise in circuit and control problems. IEEE Transactions on Circuits and Systems, 28(3), 256–261. https://doi.org/10.1109/tcs.1981.1084966 Campbell, S. L., & Poole, G. D. (1981). Computing nonnegative rank factorizations. Linear Algebra and Its Applications, 35, 175–182. https://doi.org/10.1016/0024-3795(81)90272-x Campbell, S. L., & Silverstein, J. W. (1981). A nonlinear system with singular vector field near equilibria. Applicable Analysis, 12(1), 57–71. https://doi.org/10.1080/00036818108839348 Campbell, S. (1981). A more singular singularly perturbed linear system. IEEE Transactions on Automatic Control, 26(2), 507–510. https://doi.org/10.1109/tac.1981.1102614 Campbell, S. L. (1981). On an assumption guaranteeing boundary layer convergence of singularly perturbed systems. Automatica, 17(4), 645–646. https://doi.org/10.1016/0005-1098(81)90038-8 Kelley, C. T. (1981). A note on the approximation of functions of several variables by sums of functions of one variable. Journal of Approximation Theory, 33(3), 179–189. https://doi.org/10.1016/0021-9045(81)90068-x Siewert, C. E., Kelley, C. T., & Garcia, R. D. M. (1981). An analytical expression for the H matrix relevant to Rayleigh scattering. Journal of Mathematical Analysis and Applications, 84(2), 509–518. https://doi.org/10.1016/0022-247x(81)90183-9 Kelley, C. T. (1981). Approximate methods for exit distribution problems in inhomogeneous slabs. Progress in Nuclear Energy, 8(2-3), 227–234. https://doi.org/10.1016/0149-1970(81)90017-2 Kelley, C. T. (1981). Multi-group neutron transport in inhomogeneous slabs. Journal of Integral Equations, 3, 261–275. Schreuder, G., Roise, J. P., & Tillman, D. (1981). Chapter 18, Municipal Sludge Application to Pacific Northwest Forest Lands. In C. S. Bledsoe (Ed.), Economics of Sludge Disposal in Forests (Vol. 41). University of Washington: Institute of Forest Resources. Roise, J. P., & Betters, D. R. (1981). An Aspect Transformation with Regard to Elevation for Site Productivity Models. Forest Science, 27(3), 483–486. Roise, J. P., Betters, D. R., & Kent, B. M. (1981). An Approach to Functionalizing Key Environmental Factors: Forage Production in Rocky Mountain Aspen Stands. Ecological Modeling, 14, 133–146. https://doi.org/10.1016/0304-3800(81)90018-1