Sources.

A5: V.P.Goranskij with the 50 cm meniscus Maksutov telescope of the SAI Crimean Station and Apogee Alta U8300 CCD.
DG: P.Yordanov, Antares, Dimitrovgrad, Bulgaria.
MM: V.P.Goranskij with the 1 m Zeiss telescope of SAO RAS and CCD UBVRcIc multimode photometer - polarimeter MMPP.
RA: Okayama, K.Itagaki, S.Howerton, P.C.Sherrod, G. Wells and D. Bamberger, Y.Sano, C.Raguenald, K.Shima, J.Carillo, G.Dangl, O.Guillamon, J.Presa, X.Puig, M.Aladid, R.G.Farfun, Kopernik, R.Losada, C.Balcon. http://www.rochesterastronomy.org/sn2018/sn2018zd.html
SO: V.P.Goranskij with the 1 m Zeiss telescope of SAO RAS and CCD UBVRcIc photometer.