Planned only, spontaneous only, either planned or spontaneous, both planned and spontaneous, planned changing to spontaneous, spontaneous changing to planned, between planned and spontaneous, neither planned nor spontaneous, beyond planned and spontaneous...

David Engstrøm

The Metastabilian Movement

Drazen Pavlovic

The Squiggle Sense

Complementary Pairs

Coordination Dynamics

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J. A. Scott Kelso

The Complementary Nature