1. A Homogeneous Universe of Constant Mass and Increasing Radius accounting for the Radial Velocity of Extra-galactic Nebulae
2. E. J. Alvarez, Celebrating Georges Lemaître, the great scientist who was the first to propose the Big Bang Theory, URL: https://www.indiatoday.in/education-today/gk-current-affairs/story/georges-lema-tre-the-great-scientist-who-was-the-first-to-propose-big-bang-theory-1287697-2018-07-17
3. Broken symmetries, massless particles and gauge fields
4. Broken Symmetries and the Masses of Gauge Bosons
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