Источники
The Most Critical Sales Skill Gaps in 2025 — Salesloft
New Salesloft Research Uncovers the Most Critical Sales Skill Gaps in 2025 — PR Newswire
The State of Sales Coaching in 2025 Report — MySalesCoach
Sales Coaching Statistics 2026 — MySalesCoach
Dunning-Kruger Effect — Wikipedia
Taking another perspective on overconfidence in cognitive ability — ScienceDirect
B2B Sales: The 4 Step Process to Upselling — Sales Leads Inc.
5 Key Elements of a Cross-Selling and Upselling Strategy for B2B — Leadfeeder
Definition of Done in Agile — Atlassian
State of Sales Coaching 2025 Key Insights — Aircall