Analysis of information sources in references of the Wikipedia article "Nikolai Astrup (maler)" in Danish language version.
From a medical point of view it is interesting to know that Astrup suffered from asthma all his life, and one wonders whether his motives appeared to him during long walks at night while plagued by severe attacks of asthma. One also wonders what sort of impact the disease had on the composition of his paintings. There is reason to believe that his asthma not only hampered his creative activity and brought his life to a premature end, but also influenced his visionary imagination and helped him to discover the motives for his pictures.
{{cite book}}: Ukendt parameter |isbn2= ignoreret (hjælp)Det nytter intet at sige, at jeg jo kunde få lov til at forsøge et år på Tegneskolen i Kristiania; thi da tror han vel, at jeg vil få mere lyst på malningen, og af den grund er det vel også, at han ikke liker at jeg tegner nu heller. Han bliver så sint, når jeg begynder å tale om dette, at jeg for fredens skyld helst undgår at tale om det.
{{cite book}}: Ukendt parameter |encyklopædi= ignoreret (hjælp)