A survey concerning PhD theses and counselling for PhD candidates conducted by Prof Dr Gesa Stedman resulted in an article which includes useful advice for both PhD students and their supervisors.
Gesa Stedman: “Kommunikation und Begleitung: Professionelle Doktorand(inn)enbetreuung.” BritCult, 25 Jun. 2007, britcult.de/wp-content/uploads/2019/10/Gesa-Stedman-Kommunikation-und-Begleitung.pdf.