Edge-coloured designs with block size four. C.J. Colbourn, Douglas R. Stinson (1988) Aequationes mathematicae
Efficient covering designs of the complete graph. Caro, Yair, Yuster, Raphael (1997) The Electronic Journal of Combinatorics [electronic only]
Eigenvalues of nonsingular matices and combinatorial applications Osvaldo Marrero (1976) Revista colombiana de matematicas
Eine gemeinsame Verallgemeinerung von Boses's erster und zweiter Differenzenmethode. Karl Erich Wolff (1976) Mathematische Zeitschrift
Even astral configurations. Berman, Leah Wrenn (2004) The Electronic Journal of Combinatorics [electronic only]
Extremal Polynomials for Obtaining Bounds for Spherical Codes and Designs. P. Boyvalenkov (1995) Discrete & computational geometry