The Ottaviani Intervention is often used as an attempt to disprove the validity of the NOM. However what it addressed were some of the radical changes proposed prior to the issuing of the new missal by Pope Paul VI. By the time it was published, the issues that Cardinal Ottaviani and others had with the proposed Liturgy were addressed by Pope Paul VI. Sadly some still bring it up, who have either never read it, or have read it out of context thinking it was addressing the final Typical (latin) missal promulgated in 1970
There was also a book published by Herder called the “Experimental Liturgy Book” Which claimed it had ecclesiastical approval, however it was composed of all sorts of prayers and canons which were approved, but not by Catholic ecclesiastical sources. It included all sorts of Eucharistic prayers, and more radical priests and communities used it without any authorizations, other radicals simply made up their Eucharistic Prayers, based on the idea of spontaneous prayers of the bishops in the early Church, many may not have had any basis in early prayers, but rather the new “theology” that was making it’s way around the western Church.