1. E. Albrecht and W.J. Ricker, Local spectral properties of constant coefficient differential operators in L p(ℝN) J. Operator Theory 24(1990), 85–103.
2. E. Albrecht and W.J. Ricker, Local spectral properties of certain matrix differential operators in L p(ℝN)m, J. Operator Theory 35 (1996), 3–37.
3. C.D. Aliprantis and O. Burkinshaw, Locally Solid Riesz Spaces, Academic Press, New York-London, 1978.
4. N. Aronzajn and P. Szeptycki, On general integral transformations, Math. Ann. 163 (1966), 127–154.
5. W.G. Bade, On Boolean algebras of projections and algebras of operators, Trans. Amer. Math. Soc., 80 (1955), 345–459.