On back bz author Jiri John La Cote. Published in monography by Jaromir Zemina – Jiri John No. 85. Issued by Odeon Prague 1988. Exhibited on Galerie ENGELBERTS exhibition, Genéve, 21. 5. – 20. 6. 1970, auction catalogue enclosed, catalogue page No.8. Exhibited in Czech republic and abroad for many times.
