In memory of Daniil Il'ich Khomskii

In memory of Daniil Il'ich Khomskii, Buzdin A.I., Volovik G.E., Eremin M.V., Kagan M.Yu., Kocharyan A.N., Kugel’ K.I., Mazin I.I., Sadovskii M.V., Streltsov S.V., Khaliullin G.G., Khmel’nitskii D.E., Shklovskii B.I.