Instinct and Nexus, are which form of publication?
Instinct (magazine) Instinct (ISSN 1096-0058  ) is a gay men's lifestyle magazine which was published from 1997 to 2015. The magazine was first published in 1997 by Instinct Publishing and was distributed by Curtis Circulation. The final issue was dated June–July 2015.
Science Fantasy (magazine) Science Fantasy, which also appeared under the titles Impulse and SF Impulse, was a British fantasy and science fiction magazine, launched in 1950 by Nova Publications as a companion to Nova's "New Worlds". Walter Gillings was editor for the first two issues, and was then replaced by John Carnell, the editor of "New Worlds", as a cost-saving measure. Carnell edited both magazines until Nova went out of business in early 1964. The titles were acquired by Roberts & Vinter, who hired Kyril Bonfiglioli to edit "Science Fantasy"; Bonfiglioli changed the title to "Impulse" in early 1966, but the new title led to confusion with the distributors and sales fell, though the magazine remained profitable. The title was changed again to "SF Impulse" for the last few issues. "Science Fantasy" ceased publication the following year, when Roberts & Vinter came under financial pressure after their printer went bankrupt.