On November 22, 2022, as an event of the symposion “Horia Hulubei – the man and his heritage (II)”, organized by NIPNE (IFIN-HH), two volumes containing lectures on what Hulubei called “the negative electron” (containing early experimental studies of electron, photoelectric effect, spectroscopy, old quantum theory) – the first one, and “the structure of matter” (covering essentially the atomic physics), the second one:
Horia Hulubei: The Structure of Matter, Vol. I, Editor: Victor Bârsan, Horia Hulubei Publishing House, 2022, ISBN 978-606-94603-8-2
Horia Hulubei: The Structure of Matter, Vol. II, Editor: Victor Bârsan, Horia Hulubei Publishing House, 2022, ISBN 978-606-94603-5-1
