Jack J. Dongarra, Jeremy Du Croz, Sven Hammarling, and Iain Duff, A Set of Level 3 Basic Linear Algebra Subprograms, ACM Transactions on Mathematical Software, Vol. 16, No. 1, pp. 1-17, March 1990.

Jack J. Dongarra, Jeremy Du Croz, Sven Hammarling, and Richard J. Hanson, An Extended Set of {FORTRAN} Basic Linear Algebra Subprograms, ACM Transactions on Mathematical Software, Vol. 14, No. 1, pp. 1-17, March 1988.

C. L. Lawson, R. J. Hanson, D. R. Kincaid, and F. T. Krogh, Basic Linear Algebra Subprograms for Fortran Usage, ACM Transactions on Mathematical Software, Vol. 5, No. 3, pp. 308-323, Sept. 1979.

Field G. Van Zee and Tyler M. Smith, Implementing High-performance Complex Matrix Multiplication via the 3M and 4M Methods, ACM Transactions on Mathematical Software, Vol. 44, No. 1, pp. 7:1-7:36, July 2017.

Robert van de Geijn and Kazushige Goto, BLAS (Basic Linear Algebra Subprograms), Encyclopedia of Parallel Computing, Part 2, pp. 157-164, 2011. If you don't have access, you may want to read an advanced draft.

Field G. Van Zee and Robert A. van de Geijn, BLIS: A Framework for Rapidly Instantiating BLAS Functionality, ACM Journal on Mathematical Software, Vol. 41, No. 3, June 2015. You can access this article for free by visiting the Science of High-Performance Computing group webpage and clicking on the title of Journal Article 39.