What other suttas instruct how to do Anapanasati, apart from the Anapanasati Sutta? Anapanasati is mainly covered in the Anapanasati Sutta.

Some of these instructions (perhaps additional instructions) are also written elsewhere: for example in the Anapana Samuthiya, Girimananda Sutta, the Sattipattana Suttas, Kayagatasati Sutta, etc.

What are the additional instructions or variations covered elsewhere, not covered in the Anapanasati Sutta? 

I hope that answers will do one or more of the following:


Reference suttas (apart from the Anapanasati Sutta) which include Anapanasati instructions
Quote the instructions, examples or guidance which are different or which are additional to that given in the Anapanasati Sutta
If it already given in the Anapanasati Sutta without variation, no need to quote or mention.
Comparison with Sanskrit and Tibetan text is also welcome.
MN62 Maha-Rahulovada Sutta is one of them.


  "[1] Breathing in long, he discerns, 'I am breathing in long'; or
  breathing out long, he discerns, 'I am breathing out long.' [2] Or
  breathing in short, he discerns, 'I am breathing in short'; or
  breathing out short, he discerns, 'I am breathing out short.' [3] He
  trains himself, 'I will breathe in sensitive to the entire body.' He
  trains himself, 'I will breathe out sensitive to the entire body.' [4]
  He trains himself, 'I will breathe in calming bodily fabrication.' He
  trains himself, 'I will breathe out calming bodily fabrication.'
  
  "[5] He trains himself, 'I will breathe in sensitive to rapture.' He
  trains himself, 'I will breathe out sensitive to rapture.' [6] He
  trains himself, 'I will breathe in sensitive to pleasure.' He trains
  himself, 'I will breathe out sensitive to pleasure.' [7] He trains
  himself, 'I will breathe in sensitive to mental fabrication.' He
  trains himself, 'I will breathe out sensitive to mental fabrication.'
  [8] He trains himself, 'I will breathe in calming mental fabrication.'
  He trains himself, 'I will breathe out calming mental fabrication.'
  
  "[9] He trains himself, 'I will breathe in sensitive to the mind.' He
  trains himself, 'I will breathe out sensitive to the mind.' [10] He
  trains himself, 'I will breathe in satisfying the mind.' He trains
  himself, 'I will breathe out satisfying the mind.' [11] He trains
  himself, 'I will breathe in steadying the mind.' He trains himself, 'I
  will breathe out steadying the mind.' [12] He trains himself, 'I will
  breathe in releasing the mind.' He trains himself, 'I will breathe out
  releasing the mind.'
  
  "[13] He trains himself, 'I will breathe in focusing on inconstancy.'
  He trains himself, 'I will breathe out focusing on inconstancy.' [14]
  He trains himself, 'I will breathe in focusing on dispassion.'[5] He
  trains himself, 'I will breathe out focusing on dispassion.' [15] He
  trains himself, 'I will breathe in focusing on cessation.' He trains
  himself, 'I will breathe out focusing on cessation.' [16] He trains
  himself, 'I will breathe in focusing on relinquishment.' He trains
  himself, 'I will breathe out focusing on relinquishment.'
  
  "This, Rahula, is how mindfulness of in-&amp;-out breathing is developed &amp;
  pursued so as to be of great fruit, of great benefit.
  
  "When mindfulness of in-&amp;-out breathing is developed &amp; pursued in this
  way, even one's final in-breaths &amp; out-breaths are known as they
  cease, not unknown."[6]


Just as the what was instructed by Buddha to Ven Rahula. This is the only way that i understand and experienced it myself.