I wish to read
It is a chapter in Krishna's book, Indian Philosophy: A Counter Perspective, Sri Satguru Publications, 2006.  I just bought this book, but I received the 1992 edition, which doesn't have the Patañjali essay. Apparently this essay was added only in the 2006 edition.  Neither edition of the book is available in the Vienna libraries. 

If anyone has a digital copy of the Patañjali essay, I'd be very grateful for a copy.

Best,
Dominik

--
Dr Dominik Wujastyk
Department of South Asia, Tibetan and Buddhist Studies,
University of Vienna,
Spitalgasse 2-4, Courtyard 2, Entrance 2.1
1090 Vienna, Austria